Taxon Details

Helianthus niveus ssp. tephrodes

Algodones Dunes sunflower

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Photo of Helianthus niveus ssp. tephrodes

Taxon Summary:

Helianthus niveus ssp. tephrodes, commonly known as Algodones Dunes sunflower, is a perennial herb in the Asteraceae that is found in California and elsewhere. It occurs within Desert dunes, growing at elevations from 50 to 100 meters. Helianthus niveus ssp. tephrodes is ranked 1B.2, Plants Rare, Threatened or Endangered in California and Elsewhere; Moderately threatened in California.

Classification

Scientific Name: Helianthus niveus (Benth.) Bdg. ssp. tephrodes (Gray) Heiser
Common Name: Algodones Dunes sunflower
Family:	Asteraceae
Element Code:	PDAST4N0Z2
USDA Plants Symbol:	HENIT
Synonyms/Other Names:
Name Status:	JEF, FNA, POWO, IPNI, Tropicos

Conservation Status

CA Rare Plant Rank:	1B.2
Fed List:	None
State List:	CE (1979-11-01)
Global Rank:	G4T2
State Rank:	S1
Other Status:	BLM_S; SB_CalBG/RSABG; SB_USDA
CRPR Changes:
Add Date:	1974-01-01
Date Edited:	2024-08-06

Ecology and Life History

Lifeform: perennial herb

Blooming Period: Sep-May

Elevation:
50 - 100 meters
165 - 330 feet

General Habitats:

Desert dunes

Microhabitat Details:

Microhabitat:

Notes

Notes: Threatened by vehicles. See Report on the U.S. and Mexican Boundary Survey, p. 90 (1859) by W. Emory for original description, and Memoirs of the Torrey Botanical Club 22(3):39-43 (1969) for revised nomenclature.
Threats:
Taxonomy:

Threat List Data from the CNDDB

THREAT LIST:
Threat List Total:	2
	Total EOs	% of EOs
EOs with Threat Listed:	1	33 %
ORV activity	1	33%
Other	1	33%

Occurrence Data from the CNDDB

Element Occurrence Ranks:
Total Occurrences:					3
A	B	C	D	X	U
0	1	0	0	0	2

Occurrence Status:
Historical >20 Years	1
Recent <=20 Years	2

Presence:
Presumed Extant	3
Possibly Extirpated	0
Presumed Extirpated	0

Location

California Endemic:

California Island:

States: Name (Code)
Arizona (AZ), California (CA), Sonora, Mexico (SO)

California Counties and Islands: Name (Code)
Imperial (IMP), San Diego (SDG)

Quads: Name (Quad Code)
Grays Well (3211468), Grays Well NE (3211467), Acolita (3311512), Amos (3311513), Cactus (3211478), Clark Lake (3311633), Clyde (3211488), East of Acolita (3311511), Fonts Point (3311632), Glamis (3211581), Glamis NW (3211582), Glamis SE (3211571), Tortuga (3311523)

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