Rank and Data Lists

CNPS-EB has been monitoring rare plants in Alameda and Contra Costa counties for many years. The lists below summarize some of the data we have gathered.

CNPS-EB Rare Plants

A-ranked Species (624)
- Currently Present Rare Plants (451)
  - A1-ranked (1-3 populations) (240)
  - A2-ranked (4-6 populations) (211)
- Extirpated Species (145)
- Species Being Researched (28)

CNPS Rare Plant Inventory

All Plants (129)
- 1A - Presumed Extirpated (2)
- 1B - Rare or Endangered (79)
- 2B - Rare or Endangered in California (9)
- 3 - Needs Review (4)
- 4 - Uncommon in California (35)

Endangered Species

California Endangered Species (16)
Federal Endangered Species (11)

Populations

Geography

Additional Data

CNPS-EB Watch List

All Watch List Plants (287)
- B-ranked Species (192)
- C-ranked Species (95)