Taxon Report

Jamesia americana T. & G. var. rosea C. Schneider

rosy-petalled cliffbush

Print Report

Taxon Summary

Jamesia americana var. rosea, commonly known as rosy-petalled cliffbush, is a perennial deciduous shrub in the Hydrangeaceae that is found in California and elsewhere. It occurs within Alpine boulder and rock field, Great Basin scrub, Pinyon and juniper woodland, and Subalpine coniferous forest, growing at elevations from 1980 to 3700 meters. Jamesia americana var. rosea is ranked 4.3, Plants of Limited Distribution, A Watch List; Not very threatened in California.

Classification


Scientific Name:	Jamesia americana T. & G. var. rosea C. Schneider
Common Name:	rosy-petalled cliffbush
Family:	Hydrangeaceae
Element Code:	PDHDR02019
USDA Plants Symbol:	JAAMR
Synonyms/Other Names:

Ecology and Life History


Lifeform:	perennial deciduous shrub
Blooming Period: May-Sep	May-Sep
Elevation:	1980-3700 (6495-12140)
General Habitats:	Alpine boulder and rock field, Great Basin scrub, Pinyon and juniper woodland, Subalpine coniferous forest
Microhabitat:	Carbonate (sometimes), Granitic (sometimes), Rocky
Microhabitat Details:

Conservation Status


CA Rare Plant Rank:	4.3
Global Rank:	G5T4
State Rank:	S4
State List:	None
Fed List:	None
Other Status:	SB_CalBG/RSABG
CRPR Changes:

Occurrence Data from the CNDDB


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

Location


California Endemic: False
California Counties and Islands: Name (Code)
Fresno (FRE), Inyo (INY), Mono (MNO), Tulare (TUL), Tuolumne (TUO)
Quads: Name (Quad Code)
Aberdeen (3611883), Bishop (3711834), Camp Nelson (3611825), Cerro Gordo Peak (3611757), Chagoopa Falls (3611844), Cirque Peak (3611842), Convict Lake (3711857), Coyote Flat (3711824), Dunderberg Peak (3811913), Haiwee Pass (3611821), Jail Canyon (3611722), Johnson Peak (3611843), Juniper Mtn. (3711862), Kearsarge Peak (3611873), Kern Lake (3611834), Lodgepole (3611856), Marion Peak (3611885), Mazourka Peak (3611881), Mineral King (3611845), Mount Tom (3711836), Mount Whitney (3611853), Mt. Abbot (3711847), Mt. Barcroft (3711852), Mt. Brewer (3611864), Mt. Clarence King (3611874), Mt. Darwin (3711826), Mt. Henry (3711827), Mt. Kaweah (3611854), Mt. Langley (3611852), Mt. Morgan (3711846), Mt. Pinchot (3611884), Mt. Thompson (3711825), New York Butte (3611768), North Palisade (3711815), Olancha (3611831), Sphinx Lakes (3611865), Split Mtn. (3711814), Telescope Peak (3611721), Templeton Mtn. (3611832), The Sphinx (3611875), Triple Divide Peak (3611855), Tungsten Hills (3711835), Waucoba Mtn. (3711811), Waucoba Spring (3711718), Wildrose Peak (3611731)

Threat List Data from the CNDDB


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

Notes



Scattered but never abundant. See Brittonia 41(4):335-350 (1989) for taxonomic treatment.
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].