Taxon Report

Erigeron lassenianus Greene var. deficiens Cronquist

Plumas rayless daisy

Print Report

Classification


Scientific Name:	Erigeron lassenianus Greene var. deficiens Cronquist
Common Name:	Plumas rayless daisy
Family:	Asteraceae
Element Code:	PDAST3M262
USDA Plants Symbol:	ERLAD
Synonyms/Other Names:

Ecology and Life History


Lifeform:	perennial herb
Blooming Period: Jun-Sep	Jun-Sep
Elevation:	1360-1980 (4460-6495)
General Habitats:	Lower montane coniferous forest
Microhabitat:	Disturbed areas (sometimes), Gravelly, Serpentine (sometimes)
Microhabitat Details:

Conservation Status


CA Rare Plant Rank:	1B.3
Global Rank:	G3G4T2T3
State Rank:	S2S3
State List:	None
Fed List:	None
Other Status:	SB_UCSC
CRPR Changes:	added to 1B.3 on 2012-09-28

Occurrence Data from the CNDDB


Total Occurrences:	35
Element Occurrence Ranks:
Excellent (A)	4
Good (B)	14
Fair (C)	4
Poor (D)	1
None (X)	0
Unknown (U)	12

Location


California Endemic: True
California Counties and Islands: Name (Code)
Lassen (LAS), Plumas (PLU), Sierra (SIE)
Quads: Name (Quad Code)
Almanor (4012122), American House (3912161), Canyondam (4012121), Caribou (4012112), Chester (4012132), Dogwood Peak (3912171), Goodyears Bar (3912058), Haskins Valley (3912172), La Porte (3912068), Meadow Valley (3912181), Milford (4012023), Onion Valley (3912078), Quincy (3912088), Twain (4012111)

Threat List Data from the CNDDB


Threat List Total:	7
EOs with Threat Listed:	Total EOs	% of EOs
	19	54 %
Logging	12	34%
ORV activity	10	28%
Road/trail construction/maint.	5	14%
Recreational use (non-ORV)	4	11%
Grazing	4	11%
Other	3	8%
Foot traffic/trampling	2	5%

Notes



Known mostly from Plumas NF. Potentially threatened by logging, vehicles, and habitat alteration. Plants on serpentinite may be unique; needs further study. See Brittonia 6(2):171 (1947) for original description.
Threats:

Taxonomy:

Selected References

CRPR List Addition on 2012-09-28

Citation California Native Plant Society, Rare Plant Program. 2024. Rare Plant Inventory (online edition, v9.5.1). Website https://www.rareplants.cnps.org [accessed 25 December 2024].