CNPS.ORG Inventory of Rare and Endangered Plants - 7th edition interface
v7-18mar 3-19-18
Status: record calochortus_tiburonensis - Sat, Dec. 4, 2021, 08:00 ET b
Calochortus tiburonensis
common nameTiburon mariposa lily
CalPhotos image
more photos
J. E.(Jed) and Bonnie McClellan © 1999 California Academy of Sciences  Follow image link for photo data.
life form bulbiferous herb
CA Rare Plant Rank
List 1B.1
LIST 1B: Rare, threatened, or endangered in California and elsewhere.
     0.1: Seriously endangered in California
state rank
S1      ranking system key
global rank
G1     G1: Less than 6 occurrences OR less than 1,000 individuals OR less than 2,000 acres.
Where did the "RED" code go?
CA state listingThreatened  05/87
federal listingThreatened  02/03/95
where found
MAPS - Use v8 link below.

Topographic quads (1):
San Quentin (466B) 3712284
quad data info

Counties, states, regions:
Marin (MRN)
A reminder: Species not recorded for a given area may nonetheless be present, especially where favorable conditions occur.
CNPS habitats•Valley and foothill grassland (VFGrs)(serpentinite)
blooming period Mar-Jun  
elevation range50 - 150 meters
Known from only one occurrence at Ring Mtn. Preserve on the Tiburon Peninsula. Threatened by recreational activities and non-native plants. Potentially threatened by deer browsing. See Madroņo 22(2):100-104 (1973) for original description, and Journal of Ecology 75:977-995 (1987) for population biology.
full nameCalochortus tiburonensis Hill
Version 8    INVENTORY VERSION 8 interface for this taxon, including GIS and more links

Additional information:
standard acronym  CATI3 Element Code  PMLIL0D1C0
CalFlora species this taxon    CalFlora genus related taxa
Jepson Online Jepson Interchange  Jepson Manual and other resources
Google search
search Google CNPS website    search Google entire web

Suggested citation: California Native Plant Society (CNPS). 2018. Inventory of Rare and Endangered Plants (online edition, v7-18mar). California Native Plant Society. Sacramento, CA. Accessed on Sat, Dec. 4, 2021 from

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