Species Details

Tetradymia tetrameres

dune horsebrush

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Species Description:

Tetradymia tetrameres, commonly known as dune horsebrush, is a perennial shrub in the Asteraceae that is found in California and elsewhere. It occurs within Great Basin scrub, growing at elevations from 1200 to 2135 meters. Tetradymia tetrameres is ranked 2B.2, Plants Rare, Threatened, or Endangered in California, But More Common Elsewhere; Moderately threatened in California.

Classification

Scientific Name: Tetradymia tetrameres (Blake) Strother
Common Name: dune horsebrush
Family:	Asteraceae
Element Code:	PDAST950A0
USDA Plants Symbol:	TETE4
Synonyms/Other Names:
Name Status:	JEP, FNA, POWO, IPNI, Tropicos

Conservation Status

CA Rare Plant Rank:	2B.2
Fed List:	None
State List:	None
Global Rank:	G4
State Rank:	S2
Other Status:	SB_CalBG/RSABG
CRPR Changes:
Add Date:	2001-01-01
Date Edited:	2022-12-06

Ecology and Life History

Lifeform: perennial shrub

Blooming Period: (Jul)Aug

Elevation:
1200 - 2135 meters
3935 - 7005 feet

General Habitats:

Great Basin scrub (sandy)

Microhabitat Details:

Microhabitat:

Notes

Notes: See Proceedings of the Biological Society of Washington 35:176 (1922) for original description, and Brittonia 26:192 (1974) for revised nomenclature.
Threats:
Taxonomy:

Threat List Data from the CNDDB

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

Occurrence Data from the CNDDB

Element Occurrence Ranks:
Total Occurrences:					10
A	B	C	D	X	U
0	1	1	0	0	8

Occurrence Status:
Historical >20 Years	6
Recent <=20 Years	4

Presence:
Presumed Extant	10
Possibly Extirpated	0
Presumed Extirpated	0

Location

California Endemic:

California Island:

States: Name (Code)
California (CA), Nevada (NV)

California Counties and Islands: Name (Code)
Inyo (INY), Mono (MNO)

Quads: Name (Quad Code)
Alameda Well (3811817), Deep Springs Lake (3711831), Indian Meadows (3711886), Negit Island (3811911), Sulphur Pond (3811818)

Notes:

Definitions of codes following a county and/or quad:
*		Presumed extirpated
(?)		Occurrence confirmed, but possibly extirpated
Quad and county data is imported from the CNDDB. Species may be present in other areas where conditions are favorable. These data should NOT be substituted for pre-project review or for on-site surveys.

Regional Map

Map

Presumed Extant

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CNPS Rare Plant Inventory