Taxon Report

Pyrrocoma uniflora (Hook.) Greene var. gossypina (Greene) Kartesz & Gandhi

Bear Valley pyrrocoma

Print Report

Taxon Summary

Pyrrocoma uniflora var. gossypina, commonly known as Bear Valley pyrrocoma, is a perennial herb in the Asteraceae that is found only in California. It occurs within Meadows and seeps, and Pebble (Pavement) plain, growing at elevations from 1600 to 2300 meters. Pyrrocoma uniflora var. gossypina is ranked 1B.2, Plants Rare, Threatened or Endangered in California and Elsewhere; Moderately threatened in California.

Classification


Scientific Name:	Pyrrocoma uniflora (Hook.) Greene var. gossypina (Greene) Kartesz & Gandhi
Common Name:	Bear Valley pyrrocoma
Family:	Asteraceae
Element Code:	PDASTDT0K1
USDA Plants Symbol:	PYUNG
Synonyms/Other Names:	Haplopappus uniflorus (Hook.) T. & G. ssp. gossypinus (Greene) Hall

Ecology and Life History


Lifeform:	perennial herb
Blooming Period: Jul-Sep	Jul-Sep
Elevation:	1600-2300 (5250-7545)
General Habitats:	Meadows and seeps, Pebble (Pavement) plain
Microhabitat:
Microhabitat Details:

Conservation Status


CA Rare Plant Rank:	1B.2
Global Rank:	G5T1
State Rank:	S1
State List:	None
Fed List:	None
Other Status:	SB_CalBG/RSABG; USFS_S
CRPR Changes:

Occurrence Data from the CNDDB


Total Occurrences:	17
Element Occurrence Ranks:
Excellent (A)	0
Good (B)	3
Fair (C)	3
Poor (D)	4
None (X)	2
Unknown (U)	5

Location


California Endemic: True
California Counties and Islands: Name (Code)
San Bernardino (SBD)
Quads: Name (Quad Code)
Big Bear City (3411637), Big Bear Lake (3411628), Fawnskin (3411638), Moonridge (3411627), Onyx Peak (3411626)

Threat List Data from the CNDDB


Threat List Total:	10
EOs with Threat Listed:	Total EOs	% of EOs
	13	76 %
Development	8	47%
Other	4	23%
Grazing	4	23%
Recreational use (non-ORV)	3	17%
ORV activity	3	17%
Wood cutting or brush clearing	1	5%
Foot traffic/trampling	1	5%
Logging	1	5%
Mining	1	5%
Non-native plant impacts	1	5%

Notes



Known from fewer than twenty occurrences. Threatened by grazing, development, non-native plants, recreational activities, trampling, and vehicles. See Pittonia 3:23 (1898) for original description, and Phytologia 71(1):58-65 (1991) for revised nomenclature.
Threats:

Taxonomy:

Selected References

Citation California Native Plant Society, Rare Plant Program. 2025. Rare Plant Inventory (online edition, v9.5.1). Website https://www.rareplants.cnps.org [accessed 12 May 2025].