Taxon Report

Heuchera hirsutissima Rosend., Butt. & Lak.

shaggy-haired alumroot

Print Report

Taxon Summary

Heuchera hirsutissima, commonly known as shaggy-haired alumroot, is a perennial rhizomatous herb in the Saxifragaceae that is found only in California. It occurs within Subalpine coniferous forest, and Upper montane coniferous forest, growing at elevations from 1520 to 3500 meters. Heuchera hirsutissima is ranked 1B.3, Plants Rare, Threatened or Endangered in California and Elsewhere; Not very threatened in California.

Classification


Scientific Name:	Heuchera hirsutissima Rosend., Butt. & Lak.
Common Name:	shaggy-haired alumroot
Family:	Saxifragaceae
Element Code:	PDSAX0E0J0
USDA Plants Symbol:	HEHI4
Synonyms/Other Names:

Ecology and Life History


Lifeform:	perennial rhizomatous herb
Blooming Period: (May)Jun-Jul	(May)Jun-Jul
Elevation:	1520-3500 (4985-11485)
General Habitats:	Subalpine coniferous forest, Upper montane coniferous forest
Microhabitat:	Granitic, Rocky
Microhabitat Details:

Conservation Status


CA Rare Plant Rank:	1B.3
Global Rank:	G3
State Rank:	S3
State List:	None
Fed List:	None
Other Status:	SB_CalBG/RSABG; USFS_S
CRPR Changes:

Occurrence Data from the CNDDB


Total Occurrences:	23
Element Occurrence Ranks:
Excellent (A)	0
Good (B)	1
Fair (C)	0
Poor (D)	0
None (X)	0
Unknown (U)	22

Location


California Endemic: True
California Counties and Islands: Name (Code)
Riverside (RIV)
Quads: Name (Quad Code)
Idyllwild (3311666), Palm Springs (3311675), Palm View Peak (3311665), San Jacinto Peak (3311676), Toro Peak (3311654)

Threat List Data from the CNDDB


Threat List Total:	2
EOs with Threat Listed:	Total EOs	% of EOs
	3	13 %
Foot traffic/trampling	3	13%
Erosion/runoff	1	4%

Notes




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 30 October 2025].