Taxon Report

Allium geyeri S. Watson var. tenerum M.E. Jones

bulbil onion

Print Report

Taxon Summary

Allium geyeri var. tenerum, commonly known as bulbil onion, is a perennial bulbiferous herb in the Alliaceae that is found in California and elsewhere. It occurs within Meadows and seeps, growing at elevations from 1495 to 1495 meters. Allium geyeri var. tenerum is ranked 2B.1, Plants Rare, Threatened, or Endangered in California, But More Common Elsewhere; Seriously threatened in California.

Classification


Scientific Name:	Allium geyeri S. Watson var. tenerum M.E. Jones
Common Name:	bulbil onion
Family:	Alliaceae
Element Code:	PMLIL02102
USDA Plants Symbol:	ALGET
Synonyms/Other Names:

Ecology and Life History


Lifeform:	perennial bulbiferous herb
Blooming Period: May	May
Elevation:	1495-1495 (4905-4905)
General Habitats:	Meadows and seeps
Microhabitat:	Rocky, Streambanks
Microhabitat Details:

Conservation Status


CA Rare Plant Rank:	2B.1
Global Rank:	G4G5T4T5
State Rank:	S1
State List:	None
Fed List:	None
Other Status:
CRPR Changes:	added to 2B.1 on 2021-02-03

Occurrence Data from the CNDDB


Total Occurrences:	1
Element Occurrence Ranks:
Excellent (A)	0
Good (B)	0
Fair (C)	0
Poor (D)	0
None (X)	0
Unknown (U)	1

Location


California Endemic: False
California Counties and Islands: Name (Code)
Modoc (MOD)
Quads: Name (Quad Code)
Whittemore Ridge (4112066)

Threat List Data from the CNDDB


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

Notes



Discovered in CA by L.P. Janeway in 2016. See Newsletter of the Friends of the Chico State Herbarium 26(1):7-9 (2020) for information on discovery in CA.
Threats:

Taxonomy:

Selected References

Proposed Addition to California Rare Plant Rank 2B.1, G4G5T4 / S1 (2021)

Contributions to Western Botany 10:28 (1902)

Allium geyeri var. tenerum account for potential Species of Conservation Concern evaluation (2022)

Citation California Native Plant Society, Rare Plant Program. 2025. Rare Plant Inventory (online edition, v9.5.1). Website https://www.rareplants.cnps.org [accessed 28 October 2025].