CPC Plant Profile: San Mateo Woolly-sunflower
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Plant Profile

San Mateo Woolly-sunflower (Eriophyllum latilobum)

  • Global Rank: G1 - Critically Imperiled
  • Legal Status: Federally Endangered
  • Family: Asteraceae
  • State: CA
  • Nature Serve ID: 138202
  • Date Inducted in National Collection: 03/06/1993

bushy perennial

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

Based on an September 2020 extract of the California Plant Rescue Database, California Botanic Garden holds 1 accessions of Eriophyllum latilobum in orthodox seed collection. There are as many as 7688 seeds of this species in their collection - although some may have been used for curation testing or sent to back up.

Nature Serve Biotics
  • 05/02/2017

Currently known from a single site (or possibly two now) in San Mateo County, California, where less than 300 plants are scattered along a 4 km stretch of road on a steep, unstable slope. The plants are vulnerable to soil slumping and to subsequent removal of the slumped material and reshaping of the road cut by road maintenance crews. Although maintenance crews have been made aware of the plants, accidental herbicide applications or other activities could severely damage the population. Damage did occur in 2001 due to mowing. Recreational development (a paved trail adjacent to the road) represents another potential threat. The plants apparently have low germination and seedling survival rates.

  • 01/01/2010

erosion and soil slippage, road maintenance

  • 01/01/2010

one occurrence consisting of a few hundred plants in San Mateo Co.


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Taxon Eriophyllum latilobum
Authority Rydb.
Family Asteraceae
CPC Number 1808
ITIS 37335
Common Names San Mateo Wooly-sunflower
Associated Scientific Names Eriophyllum latilobum
Distribution NA
State Rank
State State Rank
California S1

shaded moist sites on steep grassy or sparsely wooded slopes

Ecological Relationships

Common Name Name in Text Association Type Source InteractionID
bees Confirmed Pollinator Link
Syrphid flies Syrphid flies Confirmed Pollinator Link

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