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California Rare Plant Rank 1A

Plants ranked as California Rare Plant Rank 1A are presumed extirpated in California and either rare or extinct elsewhere. There are 2 taxa in the East Bay ranked 1A:

Cryptantha hooveri (Hoover's cryptantha)
Plagiobothrys glaber (hairless popcornflower)

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CNPS Inventory of Rare and Endangered Plants of California

Large specimen of pallid manzanita (Arctostaphylos pallida) at Huckleberry Preserve. Photo by Pete Veilleux, East Bay Wilds.
Big tarweed (Blepharizonia plumosa). Photo by Scott Yarger (CC BY-NC 4.0).
Mount Diablo fairy lantern (Calochortus pulchellus). Photo by Elsa de Becker.
Curled inflorescence of large-flowered fiddleneck. Photo by John Rusk (CC BY 2.0).

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