CNPS Inventory Plant Detail

Layia septentrionalis

Common Name:	Colusa layia
Family:	Asteraceae
Synonyms:
Element Code:	PDAST5N0F0
Full Name:	Layia septentrionalis Keck
USDA PLANTS Symbol:	LASE2

Biology
Lifeform: annual herb Blooming Period: April - May Habitat: sandy, serpentinite. • Chaparral • Cismontane woodland • Valley and foothill grassland

Rarity Status
CA Rare Plant Rank: 1B.2 Rare, threatened, or endangered in California and elsewhere .2: Fairly endangered in California Federal Listing Status: Not Listed State Listing Status: Not Listed State Rank: S2.2 S2: Imperiled. .2: Threatened. Global Rank: G2 G2: Imperiled.

Occurrence Data from DFG
California Natural Diversity Database

Total # of Known Element Occurrences: 46
Element Occurrence Ranks:

A B C D X U

7 5 0 0 1 33

Population Status:

Historic >20 yrs	Recent <=20 yrs
28	18

Presence:

Present Extant	Possibly Extirpated	Extirpated
45	1	0

Notes
Historical occurrences need field surveys. Threatened by development. See Aliso 4(1):106 (1958) for original description. To submit rare plant observation data, use the CNDDB field survey form. Please see also the CNPS Rare Plant Data page. Date Added: 1994-01-01 Last Update: 2010-03-15

Location

Elevation: 100 - 1095 meters

California Endemic: yes

States: California

California Counties and Islands: name (code)
Colusa (COL), Glenn (GLE), Lake (LAK), Mendocino (MEN), Napa (NAP), Sonoma (SON), Sutter (SUT), Tehama (TEH), Yolo (YOL)

Quads: name (DWR code) USGS code
Kenwood (501A)* 38122D5, Monticello Dam (515D) 38122E1, Walter Springs (516A) 38122F3, Aetna Springs (516B) 38122F4, St. Helena (516C) 38122E4, Chiles Valley (516D) 38122E3, Detert Reservoir (517A) 38122F5, Rumsey (531B) 38122H2, Glascock Mtn. (532A) 38122H3, Wilson Valley (532B) 38122H4, Knoxville (532D) 38122G3, Lower Lake (533A) 38122H5, Clearlake Highlands (533B) 38122H6, Kelseyville (534A) 38122H7, Highland Springs (534B) 38122H8, The Geysers (534D) 38122G7, Hopland (535A) 38123H1, Cloverdale (535D) 38123G1, Sutter Buttes (545A) 39121B7, Arbuckle (546D) 39122A1, Leesville (547B) 39122B4, Wilbur Springs (547C) 39122A4, Hough Springs (548A) 39122B5, Clearlake Oaks (548C) 39122A6, Benmore Canyon (548D) 39122A5, Lakeport (549C) 39122A8, Lucerne (549D) 39122A7, Purdys Gardens (550D) 39123A1, Rail Canyon (563B) 39122D4, Stonyford (564A) 39122D5, Gilmore Peak (564D) 39122C5, Elk Creek (580D) 39122E5, Paskenta (596A) 39122H5, Riley Ridge (596B) 39122H6

Notes:

Definitions of codes preceding a county and/or quad:
*		Presumed extirpated
?		Uncertain about distribution or identity
?*		Uncertain about distribution, but presumed extirpated if once present
(?)		Occurrence confirmed, but possibly extirpated

Species may be present in other areas where conditions are favorable.

Presumed Extant

Presumed Extirpated or Unknown

1710

Links to Leading Resources of Taxon Information
USDA PLANTS Calflora CalPhotos Consortium of California Herbaria California Department of Fish and Game: CNDDB Quick Viewer

Suggested Citation
California Native Plant Society (CNPS). Inventory of Rare and Endangered Plants (online edition, v8-01a). California Native Plant Society. Sacramento, CA. Accessed on .

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