CNPS.ORG Inventory of Rare and Endangered Plants - 7th edition interface
v7-18mar 3-19-18
Status: record sibara_filifolia - Thu, Dec. 2, 2021, 11:20 ET b
Sibara filifolia
common nameSanta Cruz Island winged-rockcress
CalPhotos image
more photos
© 2008 Kim M. Klementowski  Follow image link for photo data.
life formannual 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
S2      ranking system key
global rank
G2     G2: 6-20 occurrences OR 1,000-3,000 individuals OR 2,000-10,000 acres
Where did the "RED" code go?
CA state listingNone  
federal listingEndangered  08/08/97
where found
MAPS - Use v8 link below.

Topographic quads (6):
San Clemente Island South (SCMS), Santa Catalina Island East (SCTE), Santa Catalina Island North (SCTN)*, Santa Catalina Island South (SCTS), Santa Cruz Island B (SCZB)*, Santa Cruz Island C (SCZC)*
quad data info

Counties, states, regions:
San Clemente Isl. (SCM), Santa Catalina Isl. (SCT), Santa Cruz Isl. (SCZ)*
A reminder: Species not recorded for a given area may nonetheless be present, especially where favorable conditions occur.
CNPS habitats•Coastal scrub (CoScr)(rocky, volcanic)/often openings
blooming period (Feb),Mar-Apr   Months in parentheses are uncommon.
elevation range60 - 305 meters
Rediscovered in 1986 by M. Beauchamp and A. Kelly. Last seen on SCZ Isl. In 1932. Feral herbivores removed from SCM Isl., and vegetation recovering. Threatenedy by foot traffic and non-native plants. Possibly threatened on SCT Isl. by deer browsing and insect predation. See Madroņo 45(4):328 (1998) for distributional information and 50(3):181-186 (2003) for genetic diversity information.
full nameSibara filifolia (Greene) Greene
Version 8    INVENTORY VERSION 8 interface for this taxon, including GIS and more links

Additional information:
standard acronym  SIFI Element Code  PDBRA2A020
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 Thu, Dec. 2, 2021 from

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