Chaparral Orchid
Piperia elongata
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Michael's Piperia
Piperia michaelii
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Flat Spurred Piperia
Piperia transversa
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Alaska Piperia
Piperia unalascensis
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Arizona Popcornflower
Plagiobothrys arizonicus
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Bracted Popcornflower
Plagiobothrys bracteatus
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Valley Popcornflower
Plagiobothrys canescens
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Santa Catalina Popcornflower
Plagiobothrys canescens var. catalinensis
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Cognate Popcornflower
Plagiobothrys cognatus
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Cusick's Popcornflower
Plagiobothrys cusickii
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Field Popcornflower
Plagiobothrys fulvus
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Field Popcornflower
Plagiobothrys fulvus var. campestris
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Sculptured Popcornflower
Plagiobothrys glyptocarpus
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Greene's Spiny-nut Popcornflower
Plagiobothrys greenei
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Rusty Popcornflower
Plagiobothrys nothofulvus
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Shasta Popcornflower
Plagiobothrys shastensis
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Stalked Popcornflower
Plagiobothrys stipitatus
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Pacific Popcornflower
Plagiobothrys tenellus
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Slender Popcornflower
Plagiobothrys tener
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Serpentine Popcornflower
Plagiobothrys tener var. subglaber
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Plagiobothrys tener var. tener
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Rough-nutlet Popcornflower
Plagiobothrys trachycarpus
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Wavy-stemmed Popcornflower
Plagiobothrys undulatus
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Dotseed Plantain
Plantago erecta
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Woolly Plantain
Plantago patagonica
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Western Sycamore
Platanus racemosa
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Creamcups
Platystemon californicus
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Longspur Seablush
Plectritis ciliosa
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Longhorn Seablush
Plectritis macrocera
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Thorny Skeletonweed
Pleiacanthus spinosus
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Annual Semaphoregrass
Pleuropogon californicus
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Bolander's Bluegrass
Poa bolanderi
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Cusick's Bluegrass
Poa cusickii ssp. cusickii
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Muttongrass
Poa fendleriana
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Long-tongue Mutton Grass
Poa fendleriana ssp. longiligula
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Rush Blue Grass
Poa secunda ssp. juncifolia
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One-sided Bluegrass
Poa secunda ssp. secunda
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Delicate Blue Grass
Poa tenerrima
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Douglas' Pogogyne
Pogogyne douglasii
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Douglas' Mesamint
Pogogyne douglasii ssp. parviflora
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Thymeleaf Beardstyle
Pogogyne serpylloides
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Sacramento Beardstyle
Pogogyne zizyphoroides
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Annual Polemonium
Polemonium micranthum
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Bolander's Knotweed
Polygonum bolanderi
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California Knotweed
Polygonum californicum
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Fruitleaf Knotweed
Polygonum polygaloides ssp. confertiflorum
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California Polypody
Polypodium californicum
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Sarah Lyman California Polypody Fern
Polypodium californicum 'Sarah Lyman'
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Fremont Cottonwood
Populus fremontii
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Nimbus Fremont Cottonwood (male)
Populus fremontii 'Nimbus'
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Fremont Cottonwood
Populus fremontii ssp. fremontii
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Black Cottonwood
Populus trichocarpa
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Slender Cinquefoil
Potentilla gracilis
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Potentilla gracilis var. elmeri
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Slender Cinquefoil
Potentilla gracilis var. flabelliformis
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Feather Cinquefoil
Potentilla millefolia
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Brightwhite
Prenanthella exigua
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Padre's Shootingstar
Primula clevelandii
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Mosquito Bills
Primula hendersonii
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Hooker's Fairy Bell
Prosartes hookeri