CPC Plant Profile: Club-haired Mariposa Lily
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Plant Profile

Club-haired Mariposa Lily (Calochortus clavatus var. gracilis)

Photo Credit: ©2010 Benjamin Smith
  • Global Rank: T2 - Imperiled
  • Legal Status: N/A
  • Family: Liliaceae
  • State: CA
  • Nature Serve ID: 128271
  • Date Inducted in National Collection: 09/22/2021

Calochortus clavatus var. gracilis is a geographic subspecies of the Club-haired Mariposa Lily (Calochortus clavatus) and is also the smallest of the four known subspecies. Endemic to the mountain ranges in northern Los Angeles, C. c. var. gracilis can be found in the mountainous chaparral and coastal sage communities alongside a variety of local buckwheat, mint, manzanita, and grasses. During the blooming season (March-June), this delicate herb can be characterized by their golden-yellow petals; brown, internal zigzag patterns; and internally bearded texture. They are currently threatened by road maintenance, off-road vehicles, and invasive plant competition.  

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

Based on an September 2020 extract of the California Plant Rescue Database, California Botanic Garden holds 3 accessions of Calochortus clavatus var. gracilis in orthodox seed collection. There are as many as 70789 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, California Botanic Garden has collected 1 seed accessions of Calochortus clavatus var. gracilis from 1 plant occurrences listed in the California Natural Diversity Database. These collections together emcompass 40 maternal plants

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Taxon Calochortus clavatus var. gracilis
Authority Ownbey
Family Liliaceae
CPC Number 44472
ITIS 527017
Common Names Slender Mariposa Lily | Club-haired Mariposa Lily
Associated Scientific Names Calochortus clavatus var. gracilis
Distribution Currently, C. c. var. gracilis can be found in Los Angeles and Ventura counties. Within these counties, they primarily occur within Angeles National Forest and the south side of San Gabriel Mountains. 
State Rank
State State Rank
California S2S3

C. c. var. gracilis is a mountainous chaparral and coastal sage plant species that grows best in shaded areas and open slopes. They are commonly found co-occurring alongside other chaparral species including but not limited to Avena fatua, Arctostaphylos glauca, Yucca whipplei, Bromus hordeaceus, Mimulus aurantiacus, and Ceanothus cuneatus

Ecological Relationships

Common Name Name in Text Association Type Source InteractionID

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