CPC Plant Profile: Contra Costa Goldfields
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Plant Profile

Contra Costa Goldfields (Lasthenia conjugens)

  • Global Rank: G1 - Critically Imperiled
  • Legal Status: Federally Endangered
  • Family: Asteraceae
  • State: CA
  • Nature Serve ID: 154839
  • Date Inducted in National Collection: 02/09/1992

Lasthenia conjugens is 10 - 40 cm tall and typically flowers between March and June, depending on the weather and other environmental conditions.

Participating Institutions
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  • 09/01/2020
  • Orthodox Seed Banking

Based on an September 2020 extract of the California Plant Rescue Database, University of California Botanical Garden holds 3 accessions of Lasthenia conjugens in orthodox seed collection. There are as many as 56700 seeds of this species in their collection - although some may have been used for curation testing or sent to back up.

  • 08/05/2020
  • Seed Collection

Based on an August 2020 extract of the California Plant Rescue Database, University of California Botanical Garden has collected 3 seed accessions of Lasthenia conjugens from 3 plant occurrences listed in the California Natural Diversity Database. These collections together emcompass 324 maternal plants

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Taxon Lasthenia conjugens
Authority Greene
Family Asteraceae
CPC Number 2435
ITIS 37837
Common Names Contra Costa Goldfields
Associated Scientific Names Lasthenia conjugens | Baeria fremontii var. conjugens
Distribution There are 15 populations in northern California (Alameda Co., Contra Costa Co., Marin Co., Monterey Co., and Solano Co.
State Rank
State State Rank
California S1

It grows in vernal pools and swales, which can be alkaline in character, in grasslands.

Ecological Relationships

Common Name Name in Text Association Type Source InteractionID
Lead Institution State Reintroduction Type Year of First Outplanting

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