Taxon Report

Physocarpus alternans (Jones) J.T. Howell

Nevada ninebark

Print Report

Taxon Summary

Physocarpus alternans, commonly known as Nevada ninebark, is a perennial deciduous shrub in the Rosaceae that is found in California and elsewhere. It occurs within Pinyon and juniper woodland (carbonate, and rocky), growing at elevations from 1800 to 3100 meters. Physocarpus alternans is ranked 2B.3, Plants Rare, Threatened, or Endangered in California, But More Common Elsewhere; Not very threatened in California.

Classification


Scientific Name:	Physocarpus alternans (Jones) J.T. Howell
Common Name:	Nevada ninebark
Family:	Rosaceae
Element Code:	PDROS19010
USDA Plants Symbol:	PHAL7
Synonyms/Other Names:

Ecology and Life History


Lifeform:	perennial deciduous shrub
Blooming Period: Jun-Jul	Jun-Jul
Elevation:	1800-3100 (5905-10170)
General Habitats:	Pinyon and juniper woodland
Microhabitat:
Microhabitat Details:

Conservation Status


CA Rare Plant Rank:	2B.3
Global Rank:	G4
State Rank:	S3
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:	14
Element Occurrence Ranks:
Excellent (A)	0
Good (B)	2
Fair (C)	0
Poor (D)	0
None (X)	0
Unknown (U)	12

Location


California Endemic: False
California Counties and Islands: Name (Code)
Inyo (INY), Mono (MNO)
Quads: Name (Quad Code)
Blanco Mtn. (3711842), Cowhorn Valley (3711821), Crooked Creek (3711841), Deep Springs Lake (3711831), Juniper Mtn. (3711862), Panamint (3611711), Telescope Peak (3611721), Tin Mountain (3611784), Uhlmeyer Spring (3711822), Westgard Pass (3711832), White Top Mtn. (3611774)

Threat List Data from the CNDDB


Threat List Total:	1
EOs with Threat Listed:	Total EOs	% of EOs
	1	7 %
Non-native plant impacts	1	7%

Notes



See Zoe 4:42 (1893) for original description, and Proceedings of the California Academy of Sciences IV 20:130 (1931) for revised nomenclature.
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 2 April 2025].