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CNPS originally developed the Inventory of Rare and Endangered Plants of California with the guidance of botanist and evolutionary biologist G. Ledyard Stebbins. [2] The 1st Edition was printed in 1974. The last print version, the 6th Edition, was published in 2001. The 8th Edition, released in 2010 with ongoing updates, is the current database ...
CNPS maintains the online Inventory of Rare and Endangered Plants, or Inventory, which catalogs the California Rare Plant Ranks (known as "CNPS Lists" prior to 2010). The Inventory and its ranking system remain the most widely adopted source of information about California’s special rare plants today and is used on a daily basis by scientists ...
Eriogonum callistum is a Critically Imperiled endemic species in California, and is on the California Native Plant Society Inventory of Rare and Endangered Plants of California, listed as Seriously Endangered in California. [7]
It is an IUCN Red List Critically Endangered species, and a California Native Plant Society Inventory of Rare and Endangered Plants listed Seriously endangered species. [1] [9] The entire native (world) population of the tree was reduced down to thirty to forty individual trees by the 2003 Cedar Fire.
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Allium yosemitense is listed by the State of California as Rare, and included in the California Native Plant Society—CNPS Inventory of Rare and Endangered Plants of California. [ 7 ] See also
The plant is ranked as a critically endangered species by the California Native Plant Society Inventory of Rare and Endangered Plants of California, due to being threatened by new developments and off trail/road walking and vehicle (e.g. motorcycles, mountain bikes) habitat degradation.
The plant has no effective method to disperse its seeds; other species have seeds that can catch a ride on the wind, on an animal’s fur or in a bird’s stomach.