Taxon Report

Pyrrocoma racemosa (Nutt.) T. & G. var. congesta (Greene) G. Brown & Keil

Del Norte pyrrocoma

Print Report

Taxon Summary

Pyrrocoma racemosa var. congesta, commonly known as Del Norte pyrrocoma, is a perennial herb in the Asteraceae that is found in California and elsewhere. It occurs within Chaparral, and Lower montane coniferous forest, growing at elevations from 200 to 1000 meters. Pyrrocoma racemosa var. congesta is ranked 2B.3, Plants Rare, Threatened, or Endangered in California, But More Common Elsewhere; Not very threatened in California.

Classification


Scientific Name:	Pyrrocoma racemosa (Nutt.) T. & G. var. congesta (Greene) G. Brown & Keil
Common Name:	Del Norte pyrrocoma
Family:	Asteraceae
Element Code:	PDASTDT0F4
USDA Plants Symbol:	PYRAC2
Synonyms/Other Names:	Haplopappus racemosus (Nutt.) Torr. ssp. congestus (Greene) Hall

Ecology and Life History


Lifeform:	perennial herb
Blooming Period: Aug-Sep	Aug-Sep
Elevation:	200-1000 (655-3280)
General Habitats:	Chaparral, Lower montane coniferous forest
Microhabitat:	Serpentine
Microhabitat Details:

Conservation Status


CA Rare Plant Rank:	2B.3
Global Rank:	G5T4
State Rank:	S2
State List:	None
Fed List:	None
Other Status:
CRPR Changes:	changed from 2.3 to 2B.3 on 2013-06-12

Occurrence Data from the CNDDB


Total Occurrences:	13
Element Occurrence Ranks:
Excellent (A)	0
Good (B)	0
Fair (C)	0
Poor (D)	0
None (X)	0
Unknown (U)	13

Location


California Endemic: False
California Counties and Islands: Name (Code)
Del Norte (DNT)
Quads: Name (Quad Code)
Crescent City (4112472), Gasquet (4112378), High Divide (4112481), High Plateau Mtn. (4112388), Hiouchi (4112471), Shelly Creek Ridge (4112387), Sister Rocks (4112462)

Threat List Data from the CNDDB


Threat List Total:	0
EOs with Threat Listed:	Total EOs	% of EOs
	0	%

Notes




Threats:

Taxonomy:

Selected References

Pittonia 3:23 (1898)

Phytologia 73(1):57-58 (1992)

Pyrrocoma racemosa var. congesta profile for potential Species of Conservation Concern evaluation (2018)

USFS Potential Species of Conservation Concern Profile

Citation California Native Plant Society, Rare Plant Program. 2025. Rare Plant Inventory (online edition, v9.5.1). Website https://www.rareplants.cnps.org [accessed 27 January 2025].