CNPS.ORG Inventory of Rare and Endangered Plants - 7th edition interface
v7-14nov 11-15-14
Status: record hesperolinon_congestum - Sun, Nov. 23, 2014 13:33 ET c
Hesperolinon congestum
common nameMarin western flax
CalPhotos image
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© 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
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 listingThreatened  06/92
federal listingThreatened  02/03/95
where found
(12/2) v7 maps currently unavailable - use link below for v8 details and maps

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)
counties map
CNDDB Quick Viewer
Web application for exploring the CNDDB elements reported at the quad level.
(broadband recommended)
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. 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 - Details for this taxon, including GIS and other 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
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Suggested citation: California Native Plant Society (CNPS). 2014. Inventory of Rare and Endangered Plants (online edition, v7-14nov). California Native Plant Society. Sacramento, CA. Accessed on Sun, Nov. 23, 2014 from

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