Taxon Report
Hesperevax sparsiflora (Gray) Greene var. brevifolia (Gray) Morefieldshort-leaved evax |
 © 2006 Doreen L. Smith |
Classification
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Scientific Name: |
Hesperevax sparsiflora (Gray) Greene var. brevifolia (Gray) Morefield |
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Common Name: |
short-leaved evax |
| Family: | Asteraceae |
| Element Code: | PDASTE5011 |
| USDA Plants Symbol: | HESPB |
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Synonyms/Other Names: |
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Ecology and Life History
| Lifeform: | annual herb |
| Blooming Period: Mar-Jun | Mar-Jun |
| Elevation: | 0-215 (0-705) |
| General Habitats: | Coastal bluff scrub, Coastal dunes, Coastal prairie |
| Microhabitat: | |
| Microhabitat Details: |
Conservation Status
| CA Rare Plant Rank: | 1B.2 |
| Global Rank: | G4T3 |
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State Rank: |
S3 |
| State List: | None |
| Fed List: | None |
| Other Status: | BLM_S; SB_CalBG/RSABG |
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CRPR Changes: |
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Occurrence Data from the CNDDB
| Total Occurrences: | 72 |
| Element Occurrence Ranks: | |
| Excellent (A) | 4 |
| Good (B) | 26 |
| Fair (C) | 12 |
| Poor (D) | 1 |
| None (X) | 1 |
| Unknown (U) | 28 |
| California Endemic: False | |
| 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) | |
Threat List Data from the CNDDB
| Threat List Total: | 9 | |
| EOs with Threat Listed: | Total EOs | % of EOs |
| 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% |
| Recreational use (non-ORV) | 3 | 4% |
| Development | 3 | 4% |
| Erosion/runoff | 2 | 2% |
| ORV activity | 2 | 2% |
Notes
| 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. |
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Threats: |
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Taxonomy: |
Selected References
| CRPR List Change on 2008-07-09 |
Citation
California Native Plant Society, Rare Plant Program. 2024. Rare Plant Inventory (online edition, v9.5.1). Website https://www.rareplants.cnps.org [accessed 25 December 2024].