Taxon Report

Allium howellii Eastw. var. sanbenitense (Traub) McNeal & T.D. Jacobsen

San Benito onion

Print Report

Classification


Scientific Name:	Allium howellii Eastw. var. sanbenitense (Traub) McNeal & T.D. Jacobsen
Common Name:	San Benito onion
Family:	Alliaceae
Element Code:	PMLIL02163
USDA Plants Symbol:	ALHOS
Synonyms/Other Names:

Ecology and Life History


Lifeform:	perennial bulbiferous herb
Blooming Period: Apr-May	Apr-May
Elevation:	390-1365 (1280-4480)
General Habitats:	Chaparral, Valley and foothill grassland
Microhabitat:	Clay, Slopes (often)
Microhabitat Details:

Conservation Status


CA Rare Plant Rank:	1B.3
Global Rank:	G3G4T3
State Rank:	S3
State List:	None
Fed List:	None
Other Status:	BLM_S; SB_SBBG
CRPR Changes:	added to 1B.3 on 2017-04-04

Occurrence Data from the CNDDB


Total Occurrences:	18
Element Occurrence Ranks:
Excellent (A)	0
Good (B)	2
Fair (C)	0
Poor (D)	0
None (X)	0
Unknown (U)	16

Location


California Endemic: True
California Counties and Islands: Name (Code)
Fresno (FRE), Monterey (MNT), San Benito (SBT)
Quads: Name (Quad Code)
Ciervo Mtn. (3612045), Idria (3612046), Mercey Hot Springs (3612067), Panoche (3612057), Priest Valley (3612026), Tumey Hills (3612056)

Threat List Data from the CNDDB


Threat List Total:	2
EOs with Threat Listed:	Total EOs	% of EOs
	1	6 %
Grazing	1	5%
ORV activity	1	5%

Notes



Possibly threatened by grazing and development. See Herbertia 12:68 (1945) for original description, and Plant Life 28:66 (1972) and Flora of North America 26:251 (2003) for revised nomenclature.
Threats:

Taxonomy:

Selected References

Proposed Addition of A. howellii var. sanbenitense to CRPR 1B.3, G3G4T2 / S2 (2017)

Citation California Native Plant Society, Rare Plant Program. 2024. Rare Plant Inventory (online edition, v9.5.1). Website https://www.rareplants.cnps.org [accessed 25 December 2024].