Taxon Report

Chaetadelpha wheeleri Gray

Wheeler's dune-broom

Print Report

Species Description:
Chaetadelpha wheeleri, commonly known as Wheeler's dune-broom, is a perennial rhizomatous herb in the Asteraceae that is found in California and elsewhere. It occurs within Desert dunes, Great Basin scrub, and Mojavean desert scrub, growing at elevations from 795 to 1900 meters. Chaetadelpha wheeleri is ranked 2B.2, Plants Rare, Threatened, or Endangered in California, But More Common Elsewhere; Moderately threatened in California.

Classification


Scientific Name:	Chaetadelpha wheeleri Gray
Common Name:	Wheeler's dune-broom
Family:	Asteraceae
Element Code:	PDAST21010
USDA Plants Symbol:	CHWH
Synonyms/Other Names:

Ecology and Life History


Lifeform:	perennial rhizomatous herb
Blooming Period: Apr-Sep	Apr-Sep
Elevation:	795-1900 (2610-6235)
General Habitats:	Desert dunes, Great Basin scrub, Mojavean desert scrub
Microhabitat:	Sandy
Microhabitat Details:

Conservation Status


CA Rare Plant Rank:	2B.2
Global Rank:	G4
State Rank:	S2
State List:	None
Fed List:	None
Other Status:
CRPR Changes:	changed from 2.2 to 2B.2 on 2013-06-12

Occurrence Data from the CNDDB


Total Occurrences:	25
Element Occurrence Ranks:
Excellent (A)	1
Good (B)	9
Fair (C)	6
Poor (D)	0
None (X)	0
Unknown (U)	9

Location


California Endemic: False
California Counties and Islands: Name (Code)
Inyo (INY), Mono (MNO)
Quads: Name (Quad Code)
Benton (3711874), Calvada Springs (3511588), Chalfant Valley (3711853), Chidago Canyon (3711854), Deep Springs Lake (3711831), East of Joshua Flats (3711727), Hammil Valley (3711864), Last Chance Range SW (3711716), Mound Spring (3611518), Negit Island (3811911), Stump Spring, Nev. (3511587), Sulphur Pond (3811818), Westgard Pass (3711832), White Mtn. Peak (3711863)

Threat List Data from the CNDDB


Threat List Total:	3
EOs with Threat Listed:	Total EOs	% of EOs
	14	56 %
Non-native plant impacts	14	56%
ORV activity	9	36%
Development	5	20%

Notes



Threatened by vehicles and solar energy development. Possibly threatened by non-native plants. See Proceedings of the American Academy of Arts and Sciences 9:218 (1874) for original description, and Madroño 21(7):459-462 (1972) 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 24 January 2025].