Species Details

Allium hickmanii

Hickman's onion

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Classification

Scientific Name: Allium hickmanii Eastw.
Common Name: Hickman's onion
Family:	Alliaceae
Element Code:	PMLIL02140
USDA Plants Symbol:	ALHI
Synonyms/Other Names:

Conservation Status

CA Rare Plant Rank:	1B.2
Fed List:	None
State List:	None
Global Rank:	G2
State Rank:	S2
Other Status:	BLM_S; SB_SBBG; USFS_S
CRPR Changes:
Add Date:	1974-01-01
Date Edited:	2022-02-01

Ecology and Life History

Lifeform: perennial bulbiferous herb

Blooming Period: Mar-May

Elevation:
5 - 200 meters
15 - 655 feet

General Habitats:

Closed-cone coniferous forest
Chaparral (maritime)
Coastal prairie
Coastal scrub
Valley and foothill grassland

Microhabitat Details:

Microhabitat:

Notes

Notes: Threatened by urbanization, grazing, non-native plants, trampling, road construction, and military activities. See Bulletin of the Torrey Botanical Club 30:483-502 (1903) for original description.
Threats:
Taxonomy:

Threat List Data from the CNDDB

THREAT LIST:
Threat List Total:	11
	Total EOs	% of EOs
EOs with Threat Listed:	22	69 %
Development	10	31%
Grazing	5	15%
Foot traffic/trampling	4	12%
Road/trail construction/maint.	3	9%
Erosion/runoff	2	6%
Military operations	2	6%
Mining	1	3%
Non-native plant impacts	1	3%
ORV activity	1	3%
Recreational use (non-ORV)	1	3%
Vandalism/dumping/litter	1	3%

Occurrence Data from the CNDDB

Element Occurrence Ranks:
Total Occurrences:					32
A	B	C	D	X	U
4	6	1	0	0	21

Occurrence Status:
Historical >20 Years	23
Recent <=20 Years	9

Presence:
Presumed Extant	32
Possibly Extirpated	0
Presumed Extirpated	0

Location

California Endemic:

California Island:

States: Name (Code)
California (CA)

California Counties and Islands: Name (Code)
Monterey (MNT), San Luis Obispo (SLO)

Quads: Name (Quad Code)
Burro Mountain (3512173), Cape San Martin (3512184), Marina (3612167), Monterey (3612158), Pico Creek (3512152), Piedras Blancas (3512163), Salinas (3612166), San Simeon (3512162), Seaside (3612157)

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

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CNPS Rare Plant Inventory