Githopsis specularioides is a flowering plant known by the common name common bluecup. It is an annual herb which bears very small tubular flowers with white throats and five pointed purple petals. It is found on the west coast of North America from California to British Columbia.

Glehnia littoralis is a species of plant in the carrot family known by several common names, including beach silvertop and American silvertop in English, and bei sha shen (Chinese: ') and shan hu cai (Chinese: ) in Chinese. The genus was named after Russian botanist Peter von Glehn. It is native to eastern Asia, particularly eastern China, Japan, and far-eastern Russia, and western North America from Alaska to northern California.

Glossopetalon spinescens is a species of flowering shrub in the family Crossosomataceae known by the common names spiny greasebush, spiny greasewood and Nevada greasewood. It is native to the western United States and northern Mexico, where it grows in mountainous habitats, often on limestone substrates. This shrub forms a dense, erect clump of many thin, branching, thorny stems approaching 2 metres (6. 6 ft) in maximum height. The green oval leaves are less than two centimeters long. Small white-petalled flowers appear in the leaf axils. The fruit is a single or double follicle a few millimeters wide.

Glyceria borealis is a species of mannagrass known by the common names northern mannagrass, boreal mannagrass, and small floating mannagrass. It is native to much of the northern half of North America, where it has a widespread distribution. This semiaquatic plant grows in wet areas in mountain forests, often in the water. It grows a tall and very thin stem often exceeding a meter in height when erect. It may bend, lie flat on the ground, or float in the water of ponds and streams. The leaves bear ligules up to a centimeter long. The narrow, long flower cluster has cylindrical spikelets one to two centimeters long, each made up of 6 to 11 florets with membranous margins.

Fowl Mannagrass (Glyceria elata) is a native grass that grows in central and northern California. It tends to grow in shallow water and muddy shores, at elevations from 0-7000 feet.

Glyceria grandis is a species of mannagrass known by the common name American mannagrass. It is native to Canada and the United States, where it is widespread in distribution. It is most commonly found in wet areas such as riverbanks and ponds. This is a rhizomatous perennial grass bearing thin stems which approach two meters in maximum height. The sturdy leaves each have a prominent central vein. The tops of the stems are occupied with spreading, multibranched flower clusters bearing many small, oval-shaped spikelets.

Glyceria leptostachya is a species of mannagrass known by the common names davy mannagrass and narrow mannagrass. It is native to western North America from Alaska to California, where it grows in wet places such as riverbanks. This rhizomatous perennial grass produces narrow stems approaching a maximum height of 1. 5 meters. The leaves may be flat or rolled along the edges and they have ligules up to a centimeter long. The inflorescence is narrow and compact, bearing spikelets parallel to the stem instead of spreading outward. Each spikelet is one to two centimeters long and contains up to 14 or 15 florets with membranous margins.

Glyceria striata is a species of mannagrass known by the common names fowl mannagrass and ridged glyceria. It is native to much of North America, from Alaska and northern Canada to northern Mexico. It is a common species found in wet areas, often in forests. It bears erect stems exceeding a meter in maximum height and firm, narrow leaves. The spreading branches of the flower cluster hold oval-shaped to nearly round spikelets each with generally fewer than six florets.

American Licorice (Glycyrrhiza lepidota) is a species of Glycyrrhiza native to most of North America, from central Canada south through the United States to California, Texas and Virginia, but absent from the southeastern states. It is also sometimes known in the United States as "wild licorice", to distinguish it from the related European Liquorice (Glycyrrhiza glabra) which is occasionally cultivated. The plant grows in moist soils; although it will grow in heavy soil it prefers sandy soil. It grows to 40-100 centimeter (16-40 inches) tall, and has long tough brown roots which are said to be sweet and were used as food and for medicinal purposes by Native Americans. American Licorice is not sweet from sugar but from glycyrrhizin, the acid ammonium salt of the tri-basic acid, glycyrrhizic acid. Glycyrrhizin may increase blood pressure (aka hypertension) by interfering with cortisol conversion.

This plant slowly spreads by rhizome to form large patches. Bumblebees are attracted to the flowers, and this plant is a host for several butterfly plant. Wild licorice is a rare in native plant gardens, but has lots of value for wildlife, does great in heavy soils, and is tolerant of both shade and full sun. It grows well with other riparian forest species like Leymus triticoides and Carex barbarae.

Glyptopleura setulosa (holy dandelion) is a species of North American plants in the dandelion family. The species is native to the Western United States, primarily the Mojave Desert and Colorado Plateau regions in California, Nevada, Utah, and Arizona.

Gnaphalium palustre, known by the common name western marsh cudweed, is a species of flowering plant in the daisy family. The plant is native to much of western North America, where it is common in many habitats and from valley floor to mountain alpine elevations of Western Canada, the Western United States, and Northwestern Mexico. It is found from British Columbia, Alberta, and Saskatchewan south as far as Baja California Sur, Arizona, and New Mexico. Gnaphalium palustre is an annual herb growing erect stems which may be short or up to about 30 centimeters (12 inches) tall. The stems and foliage are nearly white due to their coating of woolly hairs. The leaves are small and lance-shaped to scoop-shaped. The inflorescence holds a cluster of flower heads in a nest of woolly fibers. Each head has brownish to pale yellowish phyllaries surrounding a center of many tiny flowers.

Goodmania is a genus of plants in the family Polygonaceae containing the single species Goodmania luteola. Its common name is yellow spinecape. It is a tiny annual herb forming small patches on the ground no more than a few centimeters high and wide. It has fuzzy club-shaped leaves and bears bright yellow flowers. The plant is native to California and Nevada.

Goodyera oblongifolia is a species of orchid known by the common names western rattlesnake plantain and giant rattlesnake plantain. It is native to much of North America, particularly the western side of the continent from Alaska to Mexico, and to eastern Canada. It is most commonly found in mountain forests, often in the understory of conifers. This orchid forms a patch of broad lance-shaped to oval-shaped leaves at the ground, each 4 to 9 centimeters long. The leaf is dark green and in this species the midrib is streaked with white. The netlike veining on the leaf is also white, but not as thick as the midrib stripes. The plant produces an erect flower cluster up to about 30 centimeters tall. The top of the flower cluster has many white orchid flowers which may all face the same direction on the stalk, or be spirally arranged about it.

Gratiola heterosepala is a species of flowering plant known by the common name Boggs Lake hedgehyssop. It is native to northern California, where it grows in mud and very shallow water, such as the edges of vernal pools. One occurrence of the plant has been noted in Oregon. Gratiola heterosepala is a petite annual herb with reddish-green stems a few centimeters tall. The thin stems and small leaves are dotted with hairlike glands. The top of the stem is occupied by an inflorescence producing centimeter long tubular flowers which are yellow with white tips. Boggs Lake Ecological Reserve. The plant is found and protected at the Boggs Lake Ecological Reserve in Lake County, California.

Gratiola neglecta is a species of flowering plant known by the common name clammy hedgehyssop. It is native to much of North America, including most all of the United States and the southern half of Canada. It is generally found in moist to wet habitat. This is an unobtrusive annual herb producing a glandular stem up to about 30 centimeters tall. The lance-shaped to oval leaves are arranged oppositely about the stem. They are up to 5 centimeters long and sometimes toothed along the edges. The inflorescence is a raceme of nearly cylindrical tubular whitish flowers each about a centimeter long. At the base of each flower is a fringe of five pointed sepals. The fruit is a spherical capsule about half a centimeter wide.

Grayia is a monotypic genus of plants containing the sole species Grayia spinosa, which is known by the common names hop sage and spiny hop sage. This plant is widely distributed across the western United States, where it grows in a number of desert and mountain habitats. It is a small, multibranched, brambly shrub generally under a meter in height. The grayish branches have spiny, pointed ends and stiff twigs. During the growing season the branches are covered in small oval-shaped, flat to scooplike leaves mostly under 3 centimeters in length. The shrub is dioecious, with male individuals flowering in clumps of a few flowers surrounded by leaflike leafs, and female individuals producing flower clusters of bright pink, yellow, or white fruiting leafs surrounding tiny petalless pistillate flowers. Female flower clusters are much larger than male and make the plant one of the more colorful shrubs in the springtime habitat. The fruit is a utricle only a few millimeters wide. The shrub sheds its leaves and flowers by the summer in hot or dry areas and becomes a woody gray thicket; it is evergreen in some regions. The genus was named after the botanist Asa Gray.

Greeneocharis circumscissa is a species of flowering plant in the borage family known by the common name cushion cryptantha. It is native to western North America from Washington to Baja California to Colorado, where it grows in many types of habitat from mountains to desert. It is also known from Argentina. This is an annual herb producing a short, bristly, multibranched stem tangled into a mat no more than 10 centimeters tall. It grows from a red taproot which dries purple. The leaves are up to 1. 5 centimeters long, linear to widely lance-shaped, and densely hairy to bristly. The inflorescence is a length of developing fruits with a dense cluster of up to 5 flowers at the tip. The flower has a five-lobed white corolla with yellow appendages at the top of its tube.

Grindelia camporum is a species of flowering plant in the daisy family known by the common names Great Valley gumplant and Great Valley gumweed. The plant is native to California and Baja California, where it can be found in a number of habitats including chaparral and woodlands. Its range may extend into Nevada. It is hardy plant that also readily grows in disturbed and altered areas such as ditches and roadsides. Grindelia camporum is a gangly perennial up to 2 m (6 ft. ) in maximum height but usually less. Its erect, branching stems are lined with many stiff, wavy-edged, serrated leaves 2 to 3 cm long. Atop the stem branches are inflorescences of a single large flower head up to 3 cm wide. The head is a vaguely thistlelike cup of green clawlike phyllaries that bend downward. The centre of the head is filled with yellow disc florets and there are usually many yellow ray florets around the circumference. The flower head fills with a copious white exudate, especially during the early stages of blooming. It is a traditional Native American medicinal plant, used by the Indigenous peoples of California and also a major pollinator attractant.

Grindelia fraxinipratensis, Ash Meadows gumweed, is a North American species of flowering plants in the daisy family. It is native to the southwestern United States, in Mojave Desert regions in Nye County in Nevada and Inyo County in California. Some of the Nevada populations (including the type locality) lie inside the Nevada Test Site of the United States Atomic Energy CommissionSome sources spell the name as G. fraxino-pratensis. Grindelia fraxinipratensis is the accepted spelling according to the International Code of Nomenclature.

Grindelia hirsutula is a North American species of flowering plant in the daisy family known by the common names hairy gumplant and hairy gumweed. Grindelia hirsutula is native to North America, widespread across Canada and in California and Oregon. The species is highly variable, and many local populations have been named as varieties or as distinct species. All these taxa do, however, intergrade with one another. Grindelia hirsutula is an erect perennial herb or subshrub sometimes as much as 250 cm (100 inches or 8 1/3 feet) tall but usually much shorter. The plant is usually green but the stems are often red or purplish-brown and the leaves can be somewhat yellowish to reddish. The plant can produce numerous flower heads in branching arrays at the top of the plant. Each head is 2 or 3 centimeters (0. 8-1. 2 inches) wide with hemispheric cups of greenish phyllaries around the base, the bracts claw-like and bent away from the flowers. The center of the head is filled with many small yellow disc florets surround by numerous golden ray florets. The head produces a thick white exudate, especially in new flower heads. Varieties: Grindelia hirsutula var. maritima - San Francisco Gum Plant, San Francisco gumplant, coastal gumweed; endemic to coastal California in the San Francisco Bay Area.

Grindelia hirsutula is a North American species of flowering plant in the daisy family known by the common names hairy gumplant and hairy gumweed. Grindelia hirsutula is native to North America, widespread across Canada and in California and Oregon. The species is highly variable, and many local populations have been named as varieties or as distinct species. All these taxa do, however, intergrade with one another. Grindelia hirsutula is an erect perennial herb or subshrub sometimes as much as 250 cm (100 inches or 8 1/3 feet) tall but usually much shorter. The plant is usually green but the stems are often red or purplish-brown and the leaves can be somewhat yellowish to reddish. The plant can produce numerous flower heads in branching arrays at the top of the plant. Each head is 2 or 3 centimeters (0. 8-1. 2 inches) wide with hemispheric cups of greenish phyllaries around the base, the bracts claw-like and bent away from the flowers. The center of the head is filled with many small yellow disc florets surround by numerous golden ray florets. The head produces a thick white exudate, especially in new flower heads. Varieties: Grindelia hirsutula var. maritima - San Francisco Gum Plant, San Francisco gumplant, coastal gumweed; endemic to coastal California in the San Francisco Bay Area.

Tolerant of recycled water.

Grindelia nana is a species of flowering plant in the daisy family known by the common names Idaho gumplant and Idaho gumweed. It is native to western North America, especially the western United States, where it can be found in a number of dry habitats. This is a weedlike perennial herb growing mainly erect to heights between 20 centimeters and one meter. Its stems and foliage are mostly green with some reddish coloration. Leaves are up to 9 centimeters long. The tops of the stem branches bear flower heads one or two centimeters wide, which are bell-shaped with rounded bases. The head is a cup of green clawlike, curling or erect phyllaries. The center of the head is filled with many disc florets and the circumference is lined with golden yellow ray florets.

Grindelia stricta is a species of flowering plant in the Asteraceae (Sunflower) family known by the common names Coastal Gumweed and Oregon Gumweed. It is native to the west coast of North America from California to Alaska, where it is a resident of coastal plant communities such as those in marshes and beaches. In California it is found from the Channel Islands northwards, typically in close proximity to the coast. There are three recognized Varieties: This plant is variable in appearance, taking the form of a weedlike perennial herb forming low clumps to a sprawling subshrub growing erect to heights exceeding one meter. Its foliage and stems are green to rusty red or purplish and the plant may be hairy to hairless. The fleshy leaves are green, often with red edges and veining, and are up to 15 centimeters in length on large plants. The flower cluster holds one or more flower heads each up to 5 centimeters wide. The flower head is a cup of thick erect or recurved green phyllaries. Yellow disc florets fill the center of the flower head and there is a fringe of yellow ray florets around the circumference. The head produces copious white exudate, especially in the early stages of blooming. This exudate was used by native people as an adhesive.

Marsh Gumplant (Grindelia stricta var. angustifolia) is a native perennial herb that grows in northern, southern and central California. It tends to grow in tidal flats, at elevations from 0-1600 feet.

Gumweed (Grindelia stricta var. platyphylla) is a native perennial herb that grows in Southern and Central California, primarily in the Central Coast region. It is a member of the Asteraceae and has typical sunflower floral structure with yellow disk flowers and ray flowers. It tends to grow in tidal flats, coastal strand, and coastal sage scrub typically very near the ocean, at elevations from 0-700 feet. There are three recognized varieties of Grindelia stricta; var. platyphylla is broadly distributed along the coast from Del Norte County to Los Angeles County and the northern Channel Islands. The flower bud is distinctive in having large amount of sticky white sap which native people use as an adhesive. The plant has a prostrate, sprawling habit and roots as it spreads. It performs best in coastal gardens with sandy soil.

Oregon Gumweed (Grindelia stricta var. stricta) is a native perennial herb that grows in northern, southern and central California. It tends to grow in tidal flats, at elevations from 0-700 feet.

Suisun Gumplant (Grindelia paludosa) is a putative stabilized hybrid between Grindelia camporum and Grindelia stricta var. angustifolia. It is endemic to the Suisun Bay Area, in the Deltaic Great Valley bioregion of California, growing in salt marshes and banks of sloughs. Its flowering time is between July and November.

Some botanists consider Grindelia paludosa a synonym for Grindelia hirsutula, a North American species of flowering plant in the daisy family known by the common names hairy gumplant and hairy gumweed. Grindelia hirsutula is native to North America, widespread across Canada and in California and Oregon. The species is highly variable, and many local populations have been named as varieties or as distinct species. All these taxa do, however, intergrade with one another. Grindelia hirsutula is an erect perennial herb or subshrub sometimes as much as 250 cm (100 inches or 8 1/3 feet) tall but usually much shorter. The plant is usually green but the stems are often red or purplish-brown and the leaves can be somewhat yellowish to reddish. The plant can produce numerous flower heads in branching arrays at the top of the plant. Each head is 2 or 3 centimeters (0. 8-1. 2 inches) wide with hemispheric cups of greenish phyllaries around the base, the bracts claw-like and bent away from the flowers. The center of the head is filled with many small yellow disc florets surround by numerous golden ray florets. The head produces a thick white exudate, especially in new flower heads.
Varieties: Grindelia hirsutula var. maritima - San Francisco Gum Plant, San Francisco gumplant, coastal gumweed; is endemic to the the San Francisco Bay Area in coastal northern California.

Grusonia parishii (Orcutt) Pinkava is a species of cactus known by the common names matted cholla and Parish club cholla. It is native to the Mojave and Sonoran Deserts of California and Arizona. Grusonia parishii grows in spreading mats along the sandy ground no more than about 20 centimeters tall. The segments are up to 9 centimeters long by 3 wide and is surfaced in fleshy tubercles bearing many spines each up to 5 centimeters in length. The flower is yellowish and the fruit is yellow and up to 8 centimeters long. Synonyms. Grusonia parishii (Orcutt) Pinkava, J. Arizona-Nevada Acad. Sci. 32: 50. 1999. Grusonia stanlyi (Engelm. ex B. D. Jacks. ) H. Rob. , Phytologia 26(3): 176. 1973. Opuntia parishii Orcutt, W. Amer. Sci. 10: 81. 1896. Corynopuntia parishii (Orcutt) F. M. Knuth, Kaktus-ABC 115. 1935. Corynopuntia stanlyi var. parishii (Orcutt) Backeberg, Die Cactaceae 1: 361. 1958. Opuntia stanlyi Engelm. ex B. D. Jackson, Notes of a Military Reconnaissance 157, f. 9. 1848. Opuntia stanlyi Engelmann var. parishii (Orcutt) L. D. Benson, Cacti of Arizona (ed. 2) 39. 1950.

Grusonia pulchella (Engelm. ) H. Rob. (sagebrush cholla) is a tuberous species of opuntioid cactus from the Mojave Desert of central Nevada, eastern California, northwestern Arizona and western Utah in the United States. Grusonia pulchella has at various times been included in Opuntia or placed in a separate genus Micropuntia. Grusonia pulchella differs from other North American opuntioid cacti in having a geophytic habit, where above-ground growth dies back to the crown in adverse conditions, and resprouts under more favorable conditions. Authors have described the underground storage structure as a "tuberous root" or true tuber. The above-ground stems are variable, being cylindrical to globular. The areoles bear flexible yellow spines and white wool. Overall, the above-ground growth can often form a cushion-plant habit. The flowers are bright magenta, and the fruits are dehiscent. Grusonia pulchella grows in gravelly alluvial fans, often above salt flats or alkali basins. Specimens can be locally common, although they are difficult to locate, often growing under other shrubs such as shadscale.

Gruvelia pusilla is a species of flowering plant in the borage family known by the common names little combseed and little pectocarya. It is native to the west coast of the United States from Washington to central California, where it grows in several habitat types, including disturbed areas such as roadsides. This is an annual herb producing a slender, rough-haired stem, generally upright to erect in form to a maximum height of about 38 centimeters. The small, pointed linear leaves are alternately arranged higher on the stem, and those lower on the stem are oppositely arranged and fused at the bases. The inflorescence is a series of flowers, each on a curved pedicel. The flower has small green sepals with short hooked hairs and a rounded white corolla. The fruit is an array of four flattened nutlets with fringes of comblike hairs.

Gutierrezia californica is a species of flowering plant in the Asteraceae (Sunflower) family known by the common names San Joaquin snakeweed and California matchweed. It is native to California and Baja California, where it grows on slopes and plains in a number of habitats. It is found in the Coast Ranges, Transverse Range and Peninsular Range, coming fairly close to the coast in Los Angeles, Orange and San Diego Counties. It is often seen in very arid settings. This is a small subshrub reaching up to about half a meter in height. It grows clumpy or gangly and generally erect stems in shades of gray and red which are lined with small linear green leaves. At the end of each branch of the stem is an flower cluster of one to three small flower heads just a few millimeters wide. The head contains several yellow disc florets with long, protruding styles and several yellow ray florets around the edge.

Gutierrezia microcephala is a species of flowering plant in the daisy family known by the common names sticky snakeweed, threadleaf snakeweed, threadleaf broomweed, and smallhead snakeweed. It is a subshrub native to the southwestern United States and northern Mexico, and can be found in arid grassland and desert sand dune habitats. It can be toxic to livestock in large quantities, due to the presence of saponins and high concentrations of selenium. Gutierrezia microcephala is a small, resinous, perennial desert subshrub that is typically 20 to 60 centimetres (7. 9 to 23. 6 in) in height and less than 100 centimetres (39 in) in diameter. It is heavily branched, often causing it to be nearly spherical. New shoots and twigs are green to yellow in color, and older parts are brown and woody. The leaves are linear, threadlike, and alternate; 1 to 4 centimetres (0. 39 to 1. 57 in) long and 0. 5 to 2 millimetres (0. 020 to 0. 079 in) wide. Along with the leaves, the stem tissue is photosynthetic, giving the plant a high photosynthetic capacity. G. microcephala typically flowers July to October, but this can vary depending on the amount of precipitation. Gutierrezia microcephala, a native North American plant, is found throughout the southwestern United States (from California east as far as Texas and Colorado) and northern Mexico (from Baja California to Tamaulipas, Veracruz, and Zacatecas). It occurs in a variety of ecoregions, such as arid grasslands, chaparral, sand dunes, and oak or oak-pine woodlands. G. microcephala is primarily found in well-drained sandy, gravelly, or rocky soils, and is often found in intermittently dry creeks or on the adjacent slopes. It often predominates on shallow, rocky soil, where grasses are not well established.

Gutierrezia sarothrae is a species of flowering plant in the daisy family known by the common names broom snakeweed and perennial matchweed. It is native to much of the western half of North America, from central Canada to northern Mexico. It can be found in a number of desert, grassland, and mountain habitats. This is a small, dense, bushy subshrub reaching maximum heights around half a meter. The multibranched stems and twigs are greenish or tan when young and age to woody brown. There are scattered narrow to thready leaves along the branches. The plant flowers abundantly in flower clusters of a few flowers each. The flower is about a centimeter long and bright golden yellow with a center of a few long, protruding disc florets and a fringe of ray florets. The plant is toxic to livestock in large quantities, due mainly to the presence of saponins and concentrated selenium.

Gymnosteris parvula is a flowering plant in the phlox family known by the common name smallflower gymnosteris. It is native to the western United States from California to Montana. This is a small annual herb growing a thin green to red-colored stem only a few centimeters tall. There are no leaves; the word gymnosteris comes from the Greek for "naked stem". Atop the stem is a large, fleshy inflorescence with red-tinged green bracts that serve as leaves. Within the lobular inflorescence are one to five small flowers, each less than a centimeter long. The yellow-throated flower has yellow or white oval-shaped lobes with pointed tips. It is self-pollinating.

Hackelia amethystina is a species of flowering plant in the borage family known by the common name amethyst stickseed. It is endemic to northern California, where it is found in meadows and forests in the North Coast Ranges and Sierra Nevada. It is a densely hairy perennial herb 40 to 80 centimeters tall. The leaves around the base of the stem may be up to 30 centimeters long and there are generally several smaller leaves along the stem. The inflorescence is an array of coils of flowers. Each flower is just over a centimeter wide with blue to pinkish lobes with white appendages at the bases. The fruit is a cluster of prickly nutlets.

Hackelia bella is a species of flowering plant in the borage family known by the common name greater showy stickseed. It is native to the coastal mountain ranges of northern California and southern Oregon. This sprawling perennial herb grows hairy stems to about half a meter in height. The base of the plant is surrounded by many long, thin oval-shaped leaves up to about 26 centimeters long each. Leaves farther up the stem are similar but shorter and the tops of the stems have few leaves. The small flowers have five lobes with a small petallike appendage at the base of each lobe. The flowers are usually white. The fruit is a nutlet 5 or 6 millimeters wide.

Hackelia brevicula is a species of flowering plant in the borage family known by the common name Poison Canyon stickseed. It is native to the Inyo and White Mountains which are located in California east of the Sierra Nevada and extend just into Nevada. The plant grows in the dry open, scrubby, and forested habitat of these mountains. It is a perennial herb 20 to 60 centimeters tall and coated thinly in stiff hairs. Most of the leaves are located around the base of the plant, reaching up to 18 centimeters long; there are a few smaller leaves on the stem itself. The inflorescence is an open array of branches, each a coiling panicle of flowers. Each flower is just over a centimeter wide with light blue lobes with white appendages at the bases. The fruit is a cluster of nutlets which are often prickly.

Hackelia californica is a species of flowering plant in the borage family known by the common name California stickseed. It is native to the mountains of northern California and southern Oregon, where it is a resident of mountain forests and meadows. This leafy perennial herb grows in tall clumps and produces erect stems up to a meter in maximum height. The lance-shaped leaves are longest and most abundant near the base of the plant, where the longest are about 17 centimeters long. The tips of the stems have few leaves and are occupied by cyme inflorescences of white flowers. Each flower has five lobes with a small petallike appendage at its base. The fruit is a prickly nutlet about 4 millimeters wide.

Hackelia cusickii is a species of flowering plant in the borage family known by the common name Cusick's stickseed. It is native to the Modoc Plateau in the northeastern corner of California and adjacent sections of Nevada and Oregon, where it grows in coniferous forest, woodlands, and talus. It is a perennial herb up to about 50 centimeters tall and coated thinly in stiff hairs. Most of the leaves are located around the base of the plant, reaching up to 18 centimeters long; there are a few smaller leaves on lower part of the stem as well. The hairy inflorescence is an open array of branches, each a coiling panicle of flowers. Each flower is just over a centimeter wide with blue lobes with white appendages at the bases. The fruit is a cluster of prickly nutlets.

Hackelia floribunda is a species of flowering plant in the borage family known by the common names large-flowered stickseed and manyflower stickseed. It is native to much of the western half of North America, where it is most often found in areas which are wet during the springtime, such as meadows. This is a lush biennial or perennial herb with hairy stems reaching a maximum height of about a meter. They emerge as a leafy clump, surrounded by many smooth lance-shaped leaves up to 24 centimeters long. There are few leaves at the ends of the stems, which hold cyme inflorescences of blue flowers. Each flower has five lobes with petallike appendages at their bases. The fruit is a tiny, mildly prickly nutlet.

Hackelia micrantha is a species of flowering plant in the borage family known by the common name Jessica sticktight. It is native to western North America from Alaska to northern Mexico, where it often grows in forested areas and meadows. This is a lush perennial herb growing to heights of 30 centimeters to over one meter. Its erect stems are surrounded at the base by many oval-shaped to lance-shaped leaves, the longest over 20 centimeters long. The upper stems are generally leafless and hold cyme flower clusters of bright blue flowers. Each petite flower has five rounded lobes with a smaller petallike appendage at the base of each. The fruit is a nutlet with pointed prickles.

Hackelia mundula is a species of flowering plant in the borage family known by the common name pink stickseed. It is native to the high mountains of California, especially the Sierra Nevada. Its range may extend into Oregon. This is a lush, hairy perennial herb growing to maximum heights between 40 and 80 centimeters. It produces an array of erect stems with oval- or lance-shaped leaves most abundant around the bases, growing up to 22 centimeters long. The upper stems are mostly leafless and hold cyme inflorescences of flowers. Each petite flower has 5 rounded lobes which are light pink and age to light blue in color, each with a smaller petallike appendage at its base. The fruit is a small nutlet covered in thin, hairlike prickles.

Hackelia nervosa is a species of flowering plant in the borage family known by the common name Sierra stickseed. It is native to the mountains of California, especially the Sierra Nevada and its foothills, in areas with some moisture up to near treeline. Its range may extend into Nevada. Sierra stickseed is a perennial herb starting from basal patches of oblong leaves each up to 12 centimeters long. Erect stems rise to heights between 40 and 70 centimeters, with gradually fewer and smaller leaves toward the tops. The stems hold cyme inflorescences of deep sky blue to violet flowers (see top left image); the buds are often pink. Each petite flower has five oblong rounded-end lobes, with a slightly raised appendage at the base of each forming a white ring around the yellow anthers. The flowerheads start off quite compact, but later the stems and petioles elongate to give a more open appearance (image center left). The fruit (the "stickseed") is a nutlet about half a centimeter long, covered with barb-tipped prickles that stick to almost anything (image at lower left), explaining the common name of this genus.

Hackelia setosa is a species of flowering plant in the borage family known by the common name bristly stickseed. It is native to the Klamath Mountains of northern California and southern Oregon and it is also known from Sierra Valley to the southeast of that range. It grows in open and wooded habitat. It is a hairy perennial herb up to about 60 centimeters tall. Most of the leaves are located around the base of the plant, reaching up to 22 centimeters long. Leaves higher on the stem are shorter and narrower. The hairy inflorescence is an open array of branches, each a coiling panicle of white-throated blue flowers. The fruit is a cluster of prickly nutlets.

Hackelia sharsmithii is a species of flowering plant in the borage family known by the common name Sharsmith's stickseed. It is native to the Sierra Nevada of California, where its range extends along ridges surrounding the intersection of Inyo County and Fresno and Tulare Counties, including Mount Whitney. It is a plant of rocky habitat, such as talus. It is a hairy perennial herb up to about 30 centimeters tall. Most of the leaves are located around the base of the plant, reaching up to 14 centimeters long. Leaves higher on the stem are shorter and narrower. The hairy inflorescence is an open array of branches, each a coiling panicle of light blue flowers. The fruit is a cluster of nutlets, sometimes bearing prickles.

Hackelia velutina is a species of flowering plant in the borage family known by the common name velvet stickseed. It is native to the Sierra Nevada and southern Cascade Range of California. Its range may extend into Nevada. This is a lush, hairy perennial herb reaching a maximum height between 40 and 80 centimeters. Most of the lance-shaped leaves are located around the base of the erect stems, the longest to about 17 centimeters. Atop the stems are cyme inflorescences of bright blue to lavender flowers. Each small tubular flower has five lobes with a petallike appendage at the base of each. The fruit is a nutlet covered in long prickles.