Species Details

Allium marvinii

Yucaipa onion

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Photo of Allium marvinii
© 2013 Keir Morse
Photo of Allium marvinii
© 2006 Chris Wagner, SBNF
Photo of Allium marvinii
© 2013 Keir Morse
CA Rare Plant Rank: 1B.2
Fed List: None
State List: None
Global Rank: G1
State Rank:
S1
Other Status: BLM_S; SB_CalBG/RSABG; USFS_S
CRPR Changes:
changed from 1B.1 to 1B.2 on 2015-07-06
Add Date: 2001-01-01
Date Edited: 2022-12-06
Lifeform: perennial bulbiferous herb
Blooming Period: Apr-May
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Elevation:
760 - 1065 meters
2495 - 3495 feet
General Habitats:
  • Chaparral (clay, openings)
Microhabitat Details:
Microhabitat:
Notes:
Known only from the Yucaipa and Beaumont area of the southern San Bernardino Mtns. Threatened by non-native plants, urbanization and alteration of fire regimes. Not in TJM (1993). See Bulletin of the Southern California Academy of Sciences 20:49 (1921) for original description.
Threats:
Taxonomy:
Threat List Total: 7
Total EOs % of EOs
EOs with Threat Listed: 11 23 %
THREAT LIST:
Other 5 10%
Non-native plant impacts 4 8%
Road/trail construction/maint. 3 6%
Development 3 6%
Grazing 1 2%
Total Occurrences: 47
Element Occurrence Ranks:
A B C D X U
0 3 1 0 1 42
Occurrence Status:
Historical >20 Years 14
Recent <=20 Years 33
Presence:
Presumed Extant 46
Possibly Extirpated 0
Presumed Extirpated 1
California Endemic:
California Island:
States: Name (Code)
California (CA)
California Counties and Islands: Name (Code)
Orange (ORA), Riverside (RIV), San Bernardino (SBD), San Diego (SDG)
Quads: Name (Quad Code)
Alberhill (3311764), Barrett Lake (3211666), Beaumont (3311688), Beauty Mountain (3311646), Black Star Canyon (3311776), Blackburn Canyon (3311667), Bonsall (3311732), Cameron Corners (3211664), Cuyamaca Peak (3211685), Descanso (3211675), El Cajon Mtn. (3211687), El Casco (3311781), Forest Falls (3411618), Hot Springs Mtn. (3311635), Idyllwild (3311666), Lake Mathews (3311774), Mesa Grande (3311627), Morena Reservoir (3211665), Mount Laguna (3211674), Pechanga (3311741), Rodriquez Mtn. (3311628), Sage (3311658), San Jacinto (3311678), Santa Ysabel (3311616), Sitton Peak (3311754), Viejas Mountain (3211676), Warner Springs (3311636), Wildomar (3311753)
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.
Presumed Extant
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