Taxon Report

Eriastrum rosamondense D. Gowen

Rosamond eriastrum

Print Report

Taxon Summary

Eriastrum rosamondense, commonly known as Rosamond eriastrum, is a annual herb in the Polemoniaceae that is found only in California. It occurs within Chenopod scrub (openings), and Vernal pools (edges), growing at elevations from 700 to 1175 meters. Eriastrum rosamondense is ranked 1B.1, Plants Rare, Threatened or Endangered in California and Elsewhere; Seriously threatened in California.

Classification


Scientific Name:	Eriastrum rosamondense D. Gowen
Common Name:	Rosamond eriastrum
Family:	Polemoniaceae
Element Code:	PDPLM030G0
USDA Plants Symbol:	ERRO14
Synonyms/Other Names:

Ecology and Life History


Lifeform:	annual herb
Blooming Period: Apr-May(Jun-Jul)	Apr-May(Jun-Jul)
Elevation:	700-1175 (2295-3855)
General Habitats:	Chenopod scrub, Vernal pools
Microhabitat:	Alkaline, Sandy (often)
Microhabitat Details:	Alkaline hummocks

Conservation Status


CA Rare Plant Rank:	1B.1
Global Rank:	G1?
State Rank:	S1?
State List:	None
Fed List:	None
Other Status:	SB_CalBG/RSABG
CRPR Changes:	added to 1B.1 on 2013-12-04

Occurrence Data from the CNDDB


Total Occurrences:	8
Element Occurrence Ranks:
Excellent (A)	0
Good (B)	0
Fair (C)	0
Poor (D)	0
None (X)	0
Unknown (U)	8

Location


California Endemic: True
California Counties and Islands: Name (Code)
Kern (KRN), Los Angeles (LAX)
Quads: Name (Quad Code)
Lancaster West (3411862), Rogers Lake South (3411777), Rosamond (3411872), Rosamond Lake (3411871)

Threat List Data from the CNDDB


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

Notes



Known only from the Rosamond and Rogers Dry Lake areas. Similar to E. diffusum and E. hooveri; previously identified as the latter. Threatened by development, agriculture, and non-native plants. See Journal of the Botanical Research Institute of Texas 7(1):21-24 (2013) for original description.
Threats:

Taxonomy:

Selected References

CRPR List Addition on 2013-12-04

Citation California Native Plant Society, Rare Plant Program. 2025. Rare Plant Inventory (online edition, v9.5.1). Website https://www.rareplants.cnps.org [accessed 13 November 2025].