Species Details

Dodecahema leptoceras

slender-horned spineflower

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Fed List: FE (1987-09-28)
State List: CE (1982-01-01)
Global Rank: G1
State Rank:
S1
CA Rare Plant Rank: 1B.1
Other Status: SB_CalBG/RSABG
CRPR Changes:
Add Date: 1980-01-01
Date Edited: 2021-05-26
Lifeform: annual herb
Blooming Period: Apr-Jun
Elevation:
200 - 760 meters
655 - 2495 feet
General Habitat:
  • Chaparral
  • Cismontane woodland
  • Coastal scrub (alluvial fans)
General Micro Habitat: sandy
Micro Habitat:
Notes:
Many historical occurrences lost to urbanization and stream channelization; currently threatened by alteration of fire regimes, development, sand and gravel mining, flood control, foot traffic, proposed reservoir construction, recreational activities, vehicles, and non-native plants. See Proceedings of the American Academy of Arts and Sciences 12:269 (1877) for original description, Great Basin Naturalist Memoirs 2:169-190 (1978) for taxonomic treatment, Phytologia 66(2):83-88 (1989) for revised nomenclature, and MadroƱo 44(3):305 (1997) for discussion of Vail Lake occurrence.
Threats:
Taxonomy:
Other:
References:
Total Occurrences: 41
Element Occurrence Ranks:
A B C D X U
0 12 3 0 14 12
Occurrence Status:
Historical >20 Years 27
Recent <=20 Years 14
Presence:
Presumed Extant 27
Possibly Extirpated 6
Presumed Extirpated 8
California Endemic:
California Island:
States: Name (Code)
California (CA)
California Counties and Islands: Name (Code)
Los Angeles (LAX), Riverside (RIV), San Bernardino (SBD)
Quads: Name (Quad Code)
Agua Dulce (3411843), Alberhill (3311764), Azusa (3411728), Blackburn Canyon (3311667), Burbank (3411823), Desert Hot Springs (3311685), Devore (3411724), Hemet (3311668)*, Lake Elsinore (3311763)*, Mint Canyon (3411844)*, Mt. Wilson (3411821)*, Newhall (3411845), Oat Mountain (3411835), Ontario (3411716), Pasadena (3411822), Pechanga (3311741), Redlands (3411712), San Bernardino North (3411723)*, San Bernardino South (3411713)*, San Fernando (3411834)*, Sunland (3411833), Vail Lake (3311648), Van Nuys (3411824), White Water (3311686), Yucaipa (3411711)*
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.

Map

Presumed Extant
Counties   Quads