Taxon Report

Ivesia unguiculata Gray

Yosemite ivesia

Print Report

Taxon Summary

Ivesia unguiculata, commonly known as Yosemite ivesia, is a perennial herb in the Rosaceae that is found only in California. It occurs within Meadows and seeps, Subalpine coniferous forest, and Upper montane coniferous forest, growing at elevations from 1500 to 2925 meters. Ivesia unguiculata is ranked 4.2, Plants of Limited Distribution, A Watch List; Moderately threatened in California.

Classification


Scientific Name:	Ivesia unguiculata Gray
Common Name:	Yosemite ivesia
Family:	Rosaceae
Element Code:	PDROS0X0N0
USDA Plants Symbol:	IVUN
Synonyms/Other Names:

Ecology and Life History


Lifeform:	perennial herb
Blooming Period: Jun-Sep	Jun-Sep
Elevation:	1500-2925 (4920-9595)
General Habitats:	Meadows and seeps, Subalpine coniferous forest, Upper montane coniferous forest
Microhabitat:
Microhabitat Details:

Conservation Status


CA Rare Plant Rank:	4.2
Global Rank:	G3
State Rank:	S3
State List:	None
Fed List:	None
Other Status:
CRPR Changes:

Occurrence Data from the CNDDB


Total Occurrences:	26
Element Occurrence Ranks:
Excellent (A)	6
Good (B)	2
Fair (C)	3
Poor (D)	1
None (X)	2
Unknown (U)	12

Location


California Endemic: True
California Counties and Islands: Name (Code)
Fresno (FRE), Madera (MAD), Mariposa (MPA), Mono (MNO), Tuolumne (TUO)
Quads: Name (Quad Code)
Balloon Dome (3711942), Cattle Mtn. (3711952), Courtright Reservoir (3711818), Dinkey Creek (3711912), Dogtooth Peak (3711921), El Capitan (3711966), Graveyard Peak (3711848), Half Dome (3711965), Hume (3611878), Huntington Lake (3711922), Kaiser Peak (3711932), Mariposa Grove (3711955), Mt. Givens (3711931), Musick Mtn. (3711923), Nelson Mtn. (3711911), Patterson Mtn. (3611981), Pickel Meadow (3811935), Rough Spur (3611888), Sharktooth Peak (3711941), Shaver Lake (3711913), Squaw Dome (3711943), Tenaya Lake (3711974), Timber Knob (3711953), Tower Peak (3811925), Ward Mountain (3711828)

Threat List Data from the CNDDB


Threat List Total:	7
EOs with Threat Listed:	Total EOs	% of EOs
	13	50 %
Grazing	11	42%
Road/trail construction/maint.	3	11%
Other	2	7%
Recreational use (non-ORV)	1	3%
Logging	1	3%
ORV activity	1	3%
Development	1	3%

Notes



Threatened by foot traffic, grazing, trampling, and vehicles.
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 10 February 2025].