CNPS.ORG Inventory of Rare and Endangered Plants - 7th edition interface
v7-18mar 3-19-18
Status: record hesperolinon_congestum - Wed, Dec. 8, 2021, 19:37 ET b
Hesperolinon congestum
common nameMarin western flax
CalPhotos image
more photos
© 1999 John Game  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
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  06/92
federal listingThreatened  02/03/95
where found
MAPS - Use v8 link below.

Topographic quads (10):
Palo Alto (428B) 3712242, Woodside (429A) 3712243, San Mateo (448D) 3712253, San Quentin (466B) 3712284, San Francisco North (466C) 3712274, San Rafael (467A) 3712285, Bolinas (467B) 3712286, Petaluma River (484A) 3812225, San Geronimo (484C) 3812216, Novato (484D) 3812215
quad data info

Counties, states, regions:
Marin (MRN), San Francisco (SFO), San Mateo (SMT)
A reminder: Species not recorded for a given area may nonetheless be present, especially where favorable conditions occur.
CNPS habitats•Chaparral (Chprl)
•Valley and foothill grassland (VFGrs)/serpentinite
blooming period Apr-Jul  
elevation range5 - 370 meters
Protected in part at Ring Mtn. Preserve, MRN Co. Threatened by development, non-native plants, and foot traffic. Potentially threatened by hydrological alterations. See Proceedings of the American Academy of Arts and Sciences 6:521 (1865) for original description, and University of California Publications in Botany 32:235-314 (1961) for taxonomic treatment.
full nameHesperolinon congestum (Gray) Small
Version 8    INVENTORY VERSION 8 interface for this taxon, including GIS and more links

Additional information:
standard acronym  HECO12 Element Code  PDLIN01060
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 Wed, Dec. 8, 2021 from

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