Taxon Details

Erigeron lassenianus var. deficiens

Plumas rayless daisy

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Taxon Summary:

Erigeron lassenianus var. deficiens, commonly known as Plumas rayless daisy, is a perennial herb in the Asteraceae that is found only in California. It occurs within Lower montane coniferous forest, growing at elevations from 1360 to 1980 meters. Erigeron lassenianus var. deficiens is ranked 1B.3, Plants Rare, Threatened or Endangered in California and Elsewhere; Not very threatened in California.

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:
Name Status:	JEF, FNA, POWO, IPNI, Tropicos

Conservation Status

CA Rare Plant Rank:	1B.3
Fed List:	None
State List:	None
Global Rank:	G3G4T2T3
State Rank:	S2S3
Other Status:	SB_UCSC
CRPR Changes: added to 1B.3 on 2012-09-28
Add Date:	2012-09-28
Date Edited:	2022-12-06

Ecology and Life History

Lifeform: perennial herb

Blooming Period: Jun-Sep

Elevation:
1360 - 1980 meters
4460 - 6495 feet

General Habitats:

Lower montane coniferous forest

Microhabitat Details:

Microhabitat:

Disturbed areas (sometimes)
Gravelly
Serpentine (sometimes)

Notes

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:

Threat List Data from the CNDDB

THREAT LIST:
Threat List Total:	7
	Total EOs	% of EOs
EOs with Threat Listed:	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%

Occurrence Data from the CNDDB

Element Occurrence Ranks:
Total Occurrences:					35
A	B	C	D	X	U
4	14	4	1	0	12

Occurrence Status:
Historical >20 Years	13
Recent <=20 Years	22

Presence:
Presumed Extant	35
Possibly Extirpated	0
Presumed Extirpated	0

Location

California Endemic:

California Island:

States: Name (Code)
California (CA)

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)

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.

Regional Map

Map

Presumed Extant

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CNPS Rare Plant Inventory