CNPS Inventory Plant Detail

Packera layneae

Common Name:	Layne's ragwort
Family:	Asteraceae
Synonyms:	Senecio layneae
Element Code:	PDAST8H1V0
Full Name:	Packera layneae (Greene) W.A. Weber & A. Love
USDA PLANTS Symbol:	PALA41

Biology
Lifeform: perennial herb Blooming Period: April - August Habitat: serpentinite or gabbroic, rocky. • Chaparral • Cismontane woodland

Rarity Status
CA Rare Plant Rank: 1B.2 Rare, threatened, or endangered in California and elsewhere .2: Fairly endangered in California Federal Listing Status: FT Threatened (10/18/96) State Listing Status: CR Rare (11/79) State Rank: S2 S2: Imperiled. Global Rank: G2 G2: Imperiled.

Occurrence Data from DFG
California Natural Diversity Database

Total # of Known Element Occurrences: 48
Element Occurrence Ranks:

A B C D X U

3 20 6 4 2 13

Population Status:

Historic >20 yrs	Recent <=20 yrs
13	35

Presence:

Present Extant	Possibly Extirpated	Extirpated
46	2	0

Notes

Threatened by urbanization, clearing, grazing, road construction, vehicles, and fire suppression. See Senecio layneae in The Jepson Manual (1993). See Bulletin of the Torrey Botanical Club 10:87 (1883) for original description. See Phytologia 49(1): 44-50 (1981) for revised nomenclature.
To submit rare plant observation data, use the CNDDB field survey form. Please see also the CNPS Rare Plant Data page.
Date Added: 1974-01-01
Last Update: 2010-03-15

Location

Elevation: 200 - 1000 meters

California Endemic: yes

States: California

California Counties and Islands: name (code)
Butte (BUT), El Dorado (ELD), Placer (PLA), Tuolumne (TUO), Yuba (YUB)

Quads: name (DWR code) USGS code
Chinese Camp (458C) 37120G4, Moccasin (458D) 37120G3, Placerville (510A) 38120F7, Shingle Springs (510B) 38120F8, Clarksville (511A) 38121F1, Georgetown (526A) 38120H7, Coloma (526C) 38120G8, Garden Valley (526D) 38120G7, Pilot Hill (527D) 38121G1, Foresthill (541D) 39120A7, Challenge (558B) 39121D2, Rackerby (559A) 39121D3, Clipper Mills (574C) 39121E2

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

1466

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 .

-120.875,38.75