Taxon Report

Phacelia anelsonii Macbr.

Aven Nelson's phacelia

Print Report

Taxon Summary

Phacelia anelsonii, commonly known as Aven Nelson's phacelia, is a annual herb in the Hydrophyllaceae that is found in California and elsewhere. It occurs within Joshua tree "woodland", and Pinyon and juniper woodland, growing at elevations from 1200 to 1980 meters. Phacelia anelsonii is ranked 2B.3, Plants Rare, Threatened, or Endangered in California, But More Common Elsewhere; Not very threatened in California.

Classification


Scientific Name:	Phacelia anelsonii Macbr.
Common Name:	Aven Nelson's phacelia
Family:	Hydrophyllaceae
Element Code:	PDHYD0C060
USDA Plants Symbol:	PHAN
Synonyms/Other Names:

Ecology and Life History


Lifeform:	annual herb
Blooming Period: Apr-May	Apr-May
Elevation:	1200-1980 (3935-6495)
General Habitats:	Joshua tree "woodland", Pinyon and juniper woodland
Microhabitat:	Carbonate, Gravelly (sometimes), Sandy (sometimes)
Microhabitat Details:

Conservation Status


CA Rare Plant Rank:	2B.3
Global Rank:	G2G3
State Rank:	S2
State List:	None
Fed List:	None
Other Status:	SB_CalBG/RSABG
CRPR Changes:	changed from 2.3 to 2B.3 on 2013-06-12

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: False
California Counties and Islands: Name (Code)
Inyo (INY), San Bernardino (SBD)
Quads: Name (Quad Code)
Castle Peaks (3511532), Clark Mtn. (3511555), Gene Wash (3411432), Hart Peak (3511531), Ivanpah (3511533), Jackass Canyon (3611755), Mescal Range (3511545)

Threat List Data from the CNDDB


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

Notes



See Contributions from the Gray Herbarium 49:26 (1917) for original description.
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 21 November 2025].