Taxon Report

Collomia rawsoniana Greene

Rawson's flaming trumpet

Print Report

Taxon Summary

Collomia rawsoniana, commonly known as Rawson's flaming trumpet, is a perennial rhizomatous herb in the Polemoniaceae that is found only in California. It occurs within Lower montane coniferous forest, Meadows and seeps, and Riparian forest, growing at elevations from 780 to 2200 meters. Collomia rawsoniana is ranked 1B.2, Plants Rare, Threatened or Endangered in California and Elsewhere; Moderately threatened in California.

Classification


Scientific Name:	Collomia rawsoniana Greene
Common Name:	Rawson's flaming trumpet
Family:	Polemoniaceae
Element Code:	PDPLM02080
USDA Plants Symbol:	CORA3
Synonyms/Other Names:

Ecology and Life History


Lifeform:	perennial rhizomatous herb
Blooming Period: Jul-Aug	Jul-Aug
Elevation:	780-2200 (2560-7220)
General Habitats:	Lower montane coniferous forest, Meadows and seeps, Riparian forest
Microhabitat:	Mesic
Microhabitat Details:

Conservation Status


CA Rare Plant Rank:	1B.2
Global Rank:	G2
State Rank:	S2
State List:	None
Fed List:	None
Other Status:	SB_SBBG; USFS_S
CRPR Changes:

Occurrence Data from the CNDDB


Total Occurrences:	24
Element Occurrence Ranks:
Excellent (A)	2
Good (B)	5
Fair (C)	1
Poor (D)	0
None (X)	0
Unknown (U)	16

Location


California Endemic: True
California Counties and Islands: Name (Code)
Madera (MAD)
Quads: Name (Quad Code)
Bass Lake (3711935), Cascadel Point (3711924), Little Shuteye Peak (3711944), Mammoth Pool Dam (3711933), Musick Mtn. (3711923), Shuteye Peak (3711934), White Chief Mtn. (3711945)

Threat List Data from the CNDDB


Threat List Total:	11
EOs with Threat Listed:	Total EOs	% of EOs
	18	75 %
Logging	10	41%
Recreational use (non-ORV)	5	20%
Foot traffic/trampling	4	16%
Grazing	4	16%
Development	3	12%
Altered flood/tidal/hydrologic regime	2	8%
Other	2	8%
Road/trail construction/maint.	2	8%
Dam/Inundation	2	8%
Biocides	1	4%
Erosion/runoff	1	4%

Notes



Potentially threatened by hydroelectric development, grazing, logging, and foot traffic. Interagency agreement has been established between USFWS and USFS, and Sierra NF has adopted species management guidelines. See Pittonia 1:221 (1888) for original description.
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 November 2025].