Taxon Details

Allium howellii var. howellii

Howell's onion

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Taxon Summary:

Allium howellii var. howellii, commonly known as Howell's onion, is a perennial bulbiferous herb in the Alliaceae that is found only in California. It occurs within Valley and foothill grassland, growing at elevations from 50 to 2200 meters. Allium howellii var. howellii is ranked 4.3, Plants of Limited Distribution, A Watch List; Not very threatened in California.

Classification

Scientific Name: Allium howellii Eastw. var. howellii
Common Name: Howell's onion
Family:	Alliaceae
Element Code:	PMLIL02162
USDA Plants Symbol:	ALHOH
Synonyms/Other Names:
Name Status:	JEF, FNA, POWO, IPNI, Tropicos

Conservation Status

CA Rare Plant Rank:	4.3
Fed List:	None
State List:	None
Global Rank:	G3G4T3
State Rank:	S3
Other Status:
CRPR Changes: added to 4.3 on 2017-04-04
Add Date:	2017-04-04
Date Edited:	2024-03-06

Ecology and Life History

Lifeform: perennial bulbiferous herb

Blooming Period: Mar-Apr

Elevation:
50 - 2200 meters
165 - 7220 feet

General Habitats:

Valley and foothill grassland

Microhabitat Details:

Microhabitat:

Clay (sometimes)
Serpentine (sometimes)

Notes

Notes: Many occurrences historical; need field surveys.
Threats: Possibly threatened by grazing and development.
Taxonomy:

Threat List Data from the CNDDB

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

Occurrence Data from the CNDDB

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

Occurrence Status:
Historical >20 Years	0
Recent <=20 Years	0

Presence:
Presumed Extant	0
Possibly Extirpated	0
Presumed Extirpated	0

Location

California Endemic:

California Island:

States: Name (Code)
California (CA)

California Counties and Islands: Name (Code)
Fresno (FRE), Kern (KRN), Merced (MER), San Benito (SBT), San Luis Obispo (SLO), Santa Clara (SCL), Tulare (TUL)

Quads: Name (Quad Code)
Alta Sierra (3511865), Ballinger Canyon (3411984), Bena (3511836), Breckenridge Mtn. (3511845), Caliente Mtn. (3511917), California Valley (3512031), Cerro Colorado (3612068), Chimineas Ranch (3511928), Delano West (3511973), Democrat Hot Springs (3511856), Edison (3511837), Elkhorn Hills (3511915), Fellows (3511925), Hammonds Ranch (3612076), Hepsedam Peak (3612037), Keene (3511825), Knob Hill (3511858), Lake Isabella North (3511864), Maricopa (3511914), McKittrick Summit (3511937), Mercey Hot Springs (3612067), Monolith (3511813), Oil Center (3511848), Oiler Peak (3511835), Ortigalita Peak (3612078), Packwood Creek (3512051), Painted Rock (3511927), Panoche (3612057), Panoche Pass (3612161), Panorama Hills (3511926), Pentland (3511913), Pine Mountain (3511857), Pozo Summit (3512033), Rio Bravo Ranch (3511847), San Felipe (3612184), Sand Canyon (3511868), Santa Margarita Lake (3512034), Shale Point (3511958), Simmler (3511938), Tehachapi NE (3511823), Tehachapi North (3511824), Tehachapi South (3511814), Tejon Hills (3511817), Tent Hills (3512072), The Dark Hole (3512083), Wells Ranch (3511916), White River (3511877), Woody (3511867)

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

Click on quad for name. Hold Shift Key to use mouse scroll wheel

CNPS Status Review:	Proposed Addition to CRPR 4.3, G3G4T3 / S3 (2017)
Original Description:	Leaflets of Western Botany 2(7):109 (1938)

CNPS Rare Plant Inventory