Spurred Snapdragon
Antirrhinum cornutum
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Coulter Snapdragon
Antirrhinum coulterianum
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Yellow Twining Snapdragon
Antirrhinum filipes
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Kelloggs' Snapdragon
Antirrhinum kelloggii
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Antirrhinum kingii
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Antirrhinum leptaleum
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Withered Snapdragon
Antirrhinum multiflorum
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Nuttall's Snapdragon
Antirrhinum nuttallianum
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Nuttall's Snapdragon
Antirrhinum nuttallianum ssp. nuttallianum
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Nuttall's Snapdragon
Antirrhinum nuttallianum ssp. subsessile
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Oval-leaved Snapdragon
Antirrhinum ovatum
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Dimorphic Snapdragon
Antirrhinum subcordatum
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Wiry Snapdragon
Antirrhinum vexillocalyculatum
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Antirrhinum vexillocalyculatum ssp. breweri
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Intermediate Sail-flower Snapdragon
Antirrhinum vexillocalyculatum ssp. intermedium
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Antirrhinum vexillocalyculatum ssp. vexillocalyculatum
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Twig-like Snapdragon
Antirrhinum virga
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Valley Ringstem
Anulocaulis annulatus
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Lady's Mantle
Aphanes occidentalis
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Aphanisma
Aphanisma blitoides
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Mock Parsley
Apiastrum angustifolium
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Bitter Dogbane
Apocynum androsaemifolium
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Indianhemp Dogbane
Apocynum cannabinum
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Van Houtte's Columbine
Aquilegia eximia
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Western Columbine
Aquilegia formosa
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Yellow Scarlet Columbine
Aquilegia formosa 'Yellow'
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Sierra Columbine
Aquilegia pubescens
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Desert Columbine
Aquilegia shockleyi
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Coast Rockcress
Arabis blepharophylla
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Spring Charm Coast Rock Cress
Arabis blepharophylla 'Spring Charm'
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Arabis eschscholtziana
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Holboell's Rock Cress
Arabis holboellii
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Mcdonald's Rockcress
Arabis mcdonaldiana
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Modest Rockcress
Arabis modesta
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Oregon Rockcress
Arabis oregana
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Hairy Rock Cress
Arabis pycnocarpa
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Arabis pycnocarpa var. pycnocarpa
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Elk's Clover
Aralia californica
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Pacific Madrone
Arbutus menziesii
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Lodgepole-pine Dwarf Mistletoe
Arceuthobium americanum
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Foothill Pine Dwarf Mistletoe
Arceuthobium campylopodum
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Douglas-fir Dwarf Mistletoe
Arceuthobium douglasii
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White Bear Poppy
Arctomecon merriamii
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Arroyo Cascade Manzanita
Arctostaphylos 'Arroyo Cascade'
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Austin Griffiths Manzanita
Arctostaphylos 'Austin Griffiths'
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Autumn Glow Manzanita
Arctostaphylos 'Autumn Glow'
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Baby Bear Manzanita
Arctostaphylos 'Baby Bear'
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Emerald Carpet Manzanita
Arctostaphylos 'Emerald Carpet'
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Green Witch Manzanita
Arctostaphylos 'Green Witch'
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Greensphere Manzanita
Arctostaphylos 'Greensphere'
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Havensneck Manzanita
Arctostaphylos 'Havensneck'
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Howard McMinn Manzanita
Arctostaphylos 'Howard McMinn'
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Ian Bush Manzanita
Arctostaphylos 'Ian Bush'
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John Dourley Manzanita
Arctostaphylos 'John Dourley'
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La Panza Manzanita
Arctostaphylos 'La Panza'
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Lester Rowntree Manzanita
Arctostaphylos 'Lester Rowntree'
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Lutsko's Pink Manzanita
Arctostaphylos 'Lutsko's Pink'
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Mama Bear Manzanita
Arctostaphylos 'Mama Bear'
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Margarita's Joy Manzanita
Arctostaphylos 'Margarita's Joy'
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San Bruno Mountain Manzanita
Arctostaphylos 'Mound San Bruno'