Taxon Report
Asclepias nyctaginifolia GrayMojave milkweed |
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Species Description:
Asclepias nyctaginifolia, commonly known as Mojave milkweed, 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 875 to 1700 meters. Asclepias nyctaginifolia is ranked 2B.1, Plants Rare, Threatened, or Endangered in California, But More Common Elsewhere; Seriously threatened in California.
Classification
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Scientific Name: |
Asclepias nyctaginifolia Gray |
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Common Name: |
Mojave milkweed |
| Family: | Apocynaceae |
| Element Code: | PDASC02190 |
| USDA Plants Symbol: | ASNY |
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Synonyms/Other Names: |
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Ecology and Life History
| Lifeform: | perennial herb |
| Blooming Period: May-Jun | May-Jun |
| Elevation: | 875-1700 (2870-5580) |
| General Habitats: | Mojavean desert scrub, Pinyon and juniper woodland |
| Microhabitat: | |
| Microhabitat Details: |
Conservation Status
| CA Rare Plant Rank: | 2B.1 |
| Global Rank: | G4? |
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State Rank: |
S2 |
| State List: | None |
| Fed List: | None |
| Other Status: | |
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CRPR Changes: |
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Occurrence Data from the CNDDB
| Total Occurrences: | 67 |
| Element Occurrence Ranks: | |
| Excellent (A) | 1 |
| Good (B) | 6 |
| Fair (C) | 12 |
| Poor (D) | 14 |
| None (X) | 0 |
| Unknown (U) | 34 |
| California Endemic: False | |
| California Counties and Islands: Name (Code) | |
| San Bernardino (SBD) | |
| Quads: Name (Quad Code) | |
| Cajon (3411734), Castle Peaks (3511532), Clark Mtn. (3511555), East of Grotto Hills (3511521), Grotto Hills (3511522), Hackberry Mountain (3511512), Hart Peak (3511531), Ivanpah Lake (3511554), Mescal Range (3511545), Pachalka Spring (3511556), Pinto Valley (3511523), Valley Wells (3511546) | |
Threat List Data from the CNDDB
| Threat List Total: | 10 | |
| EOs with Threat Listed: | Total EOs | % of EOs |
| 47 | 70 % | |
| Development | 30 | 44% |
| Road/trail construction/maint. | 14 | 20% |
| ORV activity | 7 | 10% |
| Biocides | 3 | 4% |
| Grazing | 3 | 4% |
| Mining | 3 | 4% |
| Non-native animal impacts | 2 | 2% |
| Erosion/runoff | 1 | 1% |
| Foot traffic/trampling | 1 | 1% |
| Recreational use (non-ORV) | 1 | 1% |
Citation
California Native Plant Society, Rare Plant Program. 2025. Rare Plant Inventory (online edition, v9.5.1). Website https://www.rareplants.cnps.org [accessed 22 January 2025].