Species Details

Packera layneae

Layne's ragwort

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Scientific Name:
Packera layneae (Greene) W.A. Weber & A. Love
Common Name:
Layne's ragwort
Family: Asteraceae
Element Code: PDAST8H1V0
USDA Plants Symbol: PALA41
Synonyms/Other Names:
CA Rare Plant Rank: 1B.2
Fed List: FT (1996-10-18)
State List: CR (1979-11-01)
Global Rank: G2
State Rank:
S2
Other Status: SB_CalBG/RSABG; SB_UCBG; SB_UCSC
CRPR Changes:
Add Date: 1974-01-01
Date Edited: 2022-06-08
Lifeform: perennial herb
Blooming Period: Apr-Aug
Elevation:
200 - 1085 meters
655 - 3560 feet
General Habitat:
  • Chaparral
  • Cismontane woodland
General Micro Habitat:
Micro Habitat:
  • Gabbroic (sometimes)
  • Rocky
  • Serpentinite (sometimes)
Notes:
Threatened by urbanization, development, clearing, grazing, road construction, vehicles, non-native plants, and fire suppression. See Senecio layneae in TJM (1993). See Bulletin of the Torrey Botanical Club 10:87 (1883) for original description. See Phytologia 49(1): 44-50 (1981) for revised nomenclature.
Threats:
Taxonomy:
Other:
Total Occurrences: 48
Element Occurrence Ranks:
A B C D X U
2 19 6 4 2 15
Occurrence Status:
Historical >20 Years 21
Recent <=20 Years 27
Presence:
Presumed Extant 46
Possibly Extirpated 2
Presumed Extirpated 0
California Endemic:
California Island:
States: Name (Code)
California (CA)
California Counties and Islands: Name (Code)
El Dorado (ELD), Placer (PLA), Tuolumne (TUO), Yuba (YUB)
Quads: Name (Quad Code)
Chinese Camp (3712074), Clarksville (3812161), Coloma (3812078), Dutch Flat (3912027), Foresthill (3912017), Garden Valley (3812077), Georgetown (3812087), Moccasin (3712073), Pilot Hill (3812171), Placerville (3812067), Rackerby (3912143), Shingle Springs (3812068)
Notes:
Definitions of codes following a county and/or quad:
* Presumed extirpated
(?) Occurrence confirmed, but possibly extirpated
Quad and county data is imported from the CNDDB. Species may be present in other areas where conditions are favorable. These data should NOT be substituted for pre-project review or for on-site surveys.

Map

Presumed Extant
Counties   Quads