CPC Plant Profile: Weed's Mariposa Lily
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Plant Profile

Weed's Mariposa Lily (Calochortus weedii var. intermedius)

Photo Credit: ©2009 Benjamin Smith
  • Global Rank: T2 - Imperiled
  • Legal Status: N/A
  • Family: Liliaceae
  • State: CA
  • Nature Serve ID: 137701
  • Date Inducted in National Collection:

The Intermediate Mariposa Lily is a geographic subspecies of Weed’s Mariposa Lily (Calochortus weedii). Unlike most of the other existing subspecies, that occur farther south, Calochortus weedii var. intermedius are endemic Los Angeles County into Orange County. C. w. var. intermedius  occurs in dry, chaparral/grassland habitat in rocky sediment. It’s a perennial, bulbous herb that produces petals of contrasting purple, yellow, and white shades with thin hairs coating the inner surface of the flower. The anthers inside are round and pointed. C.w. var. intermedius is currently an Imperiled species that suffers from development, non-native species, and livestock trampling.

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  • 09/01/2020
  • Orthodox Seed Banking

Based on an September 2020 extract of the California Plant Rescue Database, California Botanic Garden holds 4 accessions of Calochortus weedii var. intermedius in orthodox seed collection. There are as many as 19547 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 2 seed accessions of Calochortus weedii var. intermedius from 2 plant occurrences listed in the California Natural Diversity Database. These collections together emcompass 10 maternal plants

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Taxon Calochortus weedii var. intermedius
Authority Ownbey
Family Liliaceae
CPC Number 44935
ITIS 527032
Common Names Weed's Mariposa Lily | Intermediate Mariposa Lily | Foothill Mariposa Lily
Associated Scientific Names Calochortus weedii var. intermedius
Distribution Calochortus weedii var. intermedius has a broad occurrence range in Los Angeles County including: Diamond Bar, Santa Ana, Irvine, Laguna Beach, Murrieta, and San Clemente. 
State Rank
State State Rank
California S2

C. w. var. intermedius favor chaparral, coastal sage scrub, and grassland habitats with rocky sediment. They are acclimated to dry weather. 

Ecological Relationships

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

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