Mojave-aster
Xylorhiza tortifolia var. tortifolia
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California Hedge Parsley
Yabea microcarpa
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Mountain Garland White Farewell-to-Spring
Yorkia unguiculata 'Mountain Garland White'
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Banana Yucca
Yucca baccata
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Banana Yucca
Yucca baccata var. baccata
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Joshua Tree
Yucca brevifolia
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Mojave Yucca
Yucca schidigera
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Horned Pondweed
Zannichellia palustris
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Davy's Centaury
Zeltnera davyi
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Tall Centaury
Zeltnera exaltata
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Monterey Centaury
Zeltnera muehlenbergii
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Spring-loving Centaury
Zeltnera namophila
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Alkali Centaury
Zeltnera trichantha
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Canchalagua
Zeltnera venusta
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Lotebush
Ziziphus obtusifolia
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Graythorn
Ziziphus obtusifolia var. canescens
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Parry's Jujube
Ziziphus parryi
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Parry's Jujube
Ziziphus parryi var. parryi
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Common Eelgrass
Zostera marina
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Wide-leaved Eelgrass
Zostera pacifica