Species Details

Hesperevax sparsiflora var. brevifolia

short-leaved evax

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Photo of Hesperevax sparsiflora var. brevifolia
© 2006 Doreen L. Smith
Photo of Hesperevax sparsiflora var. brevifolia
© 2015 Richard Spellenberg
Photo of Hesperevax sparsiflora var. brevifolia
© 2009 Aaron Arthur
Scientific Name:
Hesperevax sparsiflora (Gray) Greene var. brevifolia (Gray) Morefield
Common Name:
short-leaved evax
Family: Asteraceae
Element Code: PDASTE5011
USDA Plants Symbol: HESPB
Synonyms/Other Names:
CA Rare Plant Rank: 1B.2
Fed List: None
State List: None
Global Rank: G4T3
State Rank:
Other Status: BLM_S; SB_CalBG/RSABG
CRPR Changes:
changed from 2.2 to 1B.2 on 2008-07-09
Add Date: 1994-01-01
Date Edited: 2022-12-06
Lifeform: annual herb
Blooming Period: Mar-Jun
0 - 215 meters
0 - 705 feet
General Habitats:
  • Coastal bluff scrub (sandy)
  • Coastal dunes
  • Coastal prairie
Microhabitat Details:
Threatened by development, competition with non-native plants, foot traffic, and recreational activities. Potentially threatened by trail construction. May intergrade with var. sparsiflora in the San Francisco Bay area. On review list in OR. See Synoptical Flora of North America 1(2):229 (1884) for original description, and Systematic Botany 17:293-310 (1992) for revised nomenclature.
Threat List Total: 9
Total EOs % of EOs
EOs with Threat Listed: 42 58 %
Non-native plant impacts 15 20%
Foot traffic/trampling 14 19%
Grazing 10 13%
Other 6 8%
Road/trail construction/maint. 6 8%
Total Occurrences: 72
Element Occurrence Ranks:
4 26 12 1 1 28
Occurrence Status:
Historical >20 Years 23
Recent <=20 Years 49
Presumed Extant 71
Possibly Extirpated 1
Presumed Extirpated 0
California Endemic:
California Island:
States: Name (Code)
California (CA), Oregon (OR)
California Counties and Islands: Name (Code)
Del Norte (DNT), Humboldt (HUM), Marin (MRN), Mendocino (MEN), San Francisco (SFO)*, San Mateo (SMT), Santa Cruz (SCR), Sonoma (SON)
Quads: Name (Quad Code)
Albion (3912327), Arched Rock (3812342), Big Basin (3712222), Bodega Head (3812331), Cannibal Island (4012463), Capetown (4012443), Crescent City (4112472), Drakes Bay (3812218), Duncans Mills (3812341), Elk (3912326), Eureka (4012472), Ferndale (4012453), Fort Bragg (3912347), Gualala (3812375), Inglenook (3912357), Mallo Pass Creek (3912316), Mendocino (3912337), Petrolia (4012433), Plantation (3812353), Point Arena (3812386), San Francisco South (3712264)*, San Mateo (3712253), Saunders Reef (3812376), Smith River (4112482), Stewarts Point (3812364), Taylor Peak (4012442), Tomales (3812228), Valley Ford (3812238)
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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