Taxon: Phacelia crenulata Torr. var. ambigua (M. E. Jones) J. F. Macbr.

Summary

Genus:

Phacelia

Family:

Hydrophyllaceae

Nomen number:

467695

Place of publication:

Contr. Gray Herb. 49:25. 1917

Verified:

02/12/2014 ARS Systematic Botanists.

Accessions:

6 (6 active, 6 available) in National Plant Germplasm System. (Map it)

Other conspecific taxa

Phacelia crenulata Torr. (22 active accession[s])
Phacelia crenulata Torr. var. corrugata (A. Nelson) Brand (3 active accession[s])
Phacelia crenulata Torr. var. crenulata (15 active accession[s])

Autonyms (not in current use), synonyms and invalid designations

Basionym
Phacelia ambigua M. E. Jones

No images

Conservation Status

Reference(s)

Baldwin, B. G. et al., eds. The Jepson manual: vascular plants of California (on-line resource).
CalFlora Database Project. CalFlora: a botanical resource for California on the internet (on-line resource).

Common names

Language	Name	seq	Citation
English	heliotrope-phacelia	1	CalFlora Database Project. CalFlora: a botanical resource for California on the internet (on-line resource).
English	notch-leaf phacelia	1	CalFlora Database Project. CalFlora: a botanical resource for California on the internet (on-line resource).
English	purple-stem phacelia	1	CalFlora Database Project. CalFlora: a botanical resource for California on the internet (on-line resource).

Distribution

order_code	Status	Continent	Subcontinent	Country	State	Note	Reference
1	Native	Northern America	Northern Mexico	Mexico	Baja California (Norte)		Cronquist, A. et al. 1972-. Intermountain flora.
1	Native	Northern America	Northern Mexico	Mexico	Sonora	n.	Cronquist, A. et al. 1972-. Intermountain flora.
1	Native	Northern America	Southwestern U.S.A.	United States	Arizona		Baldwin, B. G. et al., eds. The Jepson manual: vascular plants of California (on-line resource).
1	Native	Northern America	Southwestern U.S.A.	United States	California	s.	Baldwin, B. G. et al., eds. The Jepson manual: vascular plants of California (on-line resource).
1	Native	Northern America	Southwestern U.S.A.	United States	Nevada	s.	Cronquist, A. et al. 1972-. Intermountain flora.
1	Native	Northern America	Southwestern U.S.A.	United States	Utah	s.w.	Welsh, S. L. et al. 1993. A Utah flora.

Native
Northern America

SOUTHWESTERN U.S.A.: United States [Arizona, California (s.), Nevada (s.), Utah (s.w.)]
NORTHERN MEXICO: Mexico [Baja California (Norte), Sonora (n.)]

Reference(s)

Baldwin, B. G. et al., eds. The Jepson manual: vascular plants of California (on-line resource).
Cronquist, A. et al. 1972-. Intermountain flora.
Welsh, S. L. et al. 1993. A Utah flora.

Economic Uses

Usage	Type	Note	Reference
Vertebrate poisons	mammals	causes severe dermatitis	Cronquist, A. et al. 1972-. Intermountain flora. Note: as Phacelia ambigua

Cite as: USDA, Agricultural Research Service, National Plant Germplasm System. 2026. Germplasm Resources Information Network (GRIN Taxonomy). National Germplasm Resources Laboratory, Beltsville, Maryland.
URL: https://npgstest.ars-grin.gov/gringlobal/taxon/taxonomydetail?id=467695. Accessed 9 May 2026.