Taxon Report
Asclepias asperula (Dcne.) Woodson ssp. asperulaantelope-horns |
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Taxon Summary
Asclepias asperula ssp. asperula, commonly known as antelope-horns, is a perennial herb in the Apocynaceae that is found in California and elsewhere. It occurs within Mojavean desert scrub, and Pinyon and juniper woodland, growing at elevations from 915 to 2195 meters. Asclepias asperula ssp. asperula is ranked 4.3, Plants of Limited Distribution, A Watch List; Not very threatened in California.Classification
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Scientific Name: |
Asclepias asperula (Dcne.) Woodson ssp. asperula |
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Common Name: |
antelope-horns |
| Family: | Apocynaceae |
| Element Code: | PDASC02051 |
| USDA Plants Symbol: | ASASA |
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Synonyms/Other Names: |
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Ecology and Life History
| Lifeform: | perennial herb |
| Blooming Period: May-Sep | May-Sep |
| Elevation: | 915-2195 (3000-7200) |
| General Habitats: | Mojavean desert scrub, Pinyon and juniper woodland |
| Microhabitat: | Rocky |
| Microhabitat Details: |
Conservation Status
| CA Rare Plant Rank: | 4.3 |
| Global Rank: | G5T5 |
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State Rank: |
S3 |
| State List: | None |
| Fed List: | None |
| Other Status: | SB_CalBG/RSABG |
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CRPR Changes: |
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Occurrence Data from the CNDDB
| Total Occurrences: | 0 |
| Element Occurrence Ranks: | |
| Excellent (A) | 0 |
| Good (B) | 0 |
| Fair (C) | 0 |
| Poor (D) | 0 |
| None (X) | 0 |
| Unknown (U) | 0 |
| California Endemic: False | |
| California Counties and Islands: Name (Code) | |
| San Bernardino (SBD) | |
| Quads: Name (Quad Code) | |
| Clark Mtn. (3511555), Fountain Peak (3411585), Ivanpah (3511533), Kelso (3511516), Mescal Range (3511545), Pinto Valley (3511523) | |
Threat List Data from the CNDDB
| Threat List Total: | 0 | |
| EOs with Threat Listed: | Total EOs | % of EOs |
| 0 | 0 % | |
Citation
California Native Plant Society, Rare Plant Program. 2025. Rare Plant Inventory (online edition, v9.5.1). Website https://www.rareplants.cnps.org [accessed 28 April 2025].