CNPS.ORG Inventory of Rare and Endangered Plants - 7th edition interface
v7-18mar 3-19-18
Status: record layia_septentrionalis - Wed, Dec. 8, 2021, 04:51 ET b
Layia septentrionalis
common nameColusa layia
CalPhotos image
more photos
© 2008 Aaron Arthur  Follow image link for photo data.
life formannual herb
CA Rare Plant Rank
List 1B.2
LIST 1B: Rare, threatened, or endangered in California and elsewhere.
     0.2: Fairly 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 listingNone  
where found
MAPS - Use v8 link below.

Topographic quads (37):
Kenwood (501A)* 3812245, Santa Rosa (501B) 3812246, Monticello Dam (515D) 3812251, Walter Springs (516A) 3812263, Aetna Springs (516B) 3812264, St. Helena (516C) 3812254, Chiles Valley (516D) 3812253, Detert Reservoir (517A) 3812265, Rumsey (531B) 3812282, Glascock Mountain (532A) 3812283, Wilson Valley (532B) 3812284, Knoxville (532D) 3812273, Lower Lake (533A) 3812285, Clearlake Highlands (533B) 3812286, Whispering Pines (533C) 3812276, Kelseyville (534A) 3812287, Highland Springs (534B) 3812288, The Geysers (534D) 3812277, Hopland (535A) 3812381, Cloverdale (535D) 3812371, Sutter Buttes (545A) 3912127, Arbuckle (546D) 3912211, Leesville (547B) 3912224, Wilbur Springs (547C) 3912214, Hough Springs (548A) 3912225, Clearlake Oaks (548C) 3912216, Benmore Canyon (548D) 3912215, Lakeport (549C) 3912218, Lucerne (549D) 3912217, Purdys Gardens (550D) 3912311, Rail Canyon (563B) 3912244, Stonyford (564A) 3912245, Gilmore Peak (564D) 3912235, Cherokee (576A) 3912165, Elk Creek (580D) 3912255, Paskenta (596A) 3912285, Riley Ridge (596B) 3912286
quad data info

Counties, states, regions:
Butte (BUT), Colusa (COL), Glenn (GLE), Lake (LAK), Mendocino (MEN), Napa (NAP), Sonoma (SON), Sutter (SUT), Tehama (TEH), Yolo (YOL)
A reminder: Species not recorded for a given area may nonetheless be present, especially where favorable conditions occur.
CNPS habitats•Chaparral (Chprl)
•Cismontane woodland (CmWld)
•Valley and foothill grassland (VFGrs)/sandy, serpentinite
blooming period Apr-May  
elevation range100 - 1095 meters
Historical occurrences need field surveys. Threatened by development. See Aliso 4(1):106 (1958) for original description.
full nameLayia septentrionalis Keck
Version 8    INVENTORY VERSION 8 interface for this taxon, including GIS and more links

Additional information:
standard acronym  LASE2 Element Code  PDAST5N0F0
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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