CNPS.ORG Inventory of Rare and Endangered Plants - 7th edition interface
v7-18mar 3-19-18
Status: record dodecahema_leptoceras - Sat, Dec. 4, 2021, 21:23 ET b
Dodecahema leptoceras
common nameslender-horned spineflower
CalPhotos image
more photos
© 2007 Jordan Zylstra  Follow image link for photo data.
life formannual herb
CA Rare Plant Rank
List 1B.1
LIST 1B: Rare, threatened, or endangered in California and elsewhere.
     0.1: Seriously endangered in California
state rank
S1      ranking system key
global rank
G1     G1: Less than 6 occurrences OR less than 1,000 individuals OR less than 2,000 acres.
Where did the "RED" code go?
CA state listingEndangered  01/82
federal listingEndangered  09/28/87
where found
MAPS - Use v8 link below.

Topographic quads (26):
Vail Lake (049B) 3311648, Pechanga (050A) 3311741, Blackburn Canyon (067A) 3311667, Hemet (067B)* 3311668, Lake Elsinore (069A)* 3311763, Alberhill (069B) 3311764, El Toro (070B) 3311766, White Water (083B) 3311686, San Jacinto (084C)* 3311678, Catclaw Flat (104C) 3411616, Redlands (106C) 3411712, Yucaipa (106D)* 3411711, San Bernardino North (107A)* 3411723, Devore (107B) 3411724, San Bernardino South (107D)* 3411713, Ontario (108C) 3411716, Azusa (109B) 3411728, Mount Wilson (110A)* 3411821, Pasadena (110B) 3411822, Burbank (111A) 3411823, Cajon (133C)* 3411734, Agua Dulce (137A) 3411843, Mint Canyon (137B)* 3411844, San Fernando (137C)* 3411834, Sunland (137D) 3411833, Newhall (138A) 3411845
quad data info

Counties, states, regions:
Los Angeles (LAX), Riverside (RIV), San Bernardino (SBD)
A reminder: Species not recorded for a given area may nonetheless be present, especially where favorable conditions occur.
CNPS habitats•Chaparral (Chprl)
•Cismontane woodland (CmWld)
•Coastal scrub (CoScr)(alluvial fan)/sandy
blooming period Apr-Jun  
elevation range200 - 760 meters
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 Madroņo 44(3):305 (1997) for discussion of Vail Lake occurrence.
full nameDodecahema leptoceras (Gray) Rev. & Hardham
Version 8    INVENTORY VERSION 8 interface for this taxon, including GIS and more links

Additional information:
standard acronym  DOLE Element Code  PDPGN0V010
CalFlora species this taxon    CalFlora genus related taxa
Jepson Online Jepson Interchange  Jepson Manual and other resources
Google search
search Google CNPS website    search Google entire web

Suggested citation: California Native Plant Society (CNPS). 2018. Inventory of Rare and Endangered Plants (online edition, v7-18mar). California Native Plant Society. Sacramento, CA. Accessed on Sat, Dec. 4, 2021 from

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