Species Information
Kingdom: Plantae
Phylum: Anthophyta
Class: Dicotyledoneae
Order: Fabales
Family: Fabaceae
Genus: Astragalus
Species: oocalycis
Arborales Milkvetch - Astragalus oocalycis
Image courtesy of New Mexico Rare Plants
372053
Species Extent (New Mexico)
General Description
Perennial; stems erect or ascending, 20-40 cm long; herbage green to gray-green; leaves pinnately compound, 5-15 cm long; leaflets 19-27, 2-4 cm long, nearly glabrous above; flowers ochroleucus (yellow-white), in dense 35-60-flowered racemes; calyx densely hirsute with straight or spreading hairs, with age becoming papery and inflated, ovoid or subglobose, up to 14 mm long, 11 mm wide, contracted at the mouth; pods 6-7 mm long, declined, glabrous, grooved on lower side, becoming leathery as they mature. Flowers May to July.
Status
Global Rank: G4
State Rank: S3
| Rank Metadata | |
|---|---|
| State Rank: S3 | Rank Changed: 08/11/1981 |
| Rank Reviewed: 04/21/2025 | |
| Reason: This species has a somewhat narrow range within New Mexico, but with 32 EOs, it is not too uncommon within its range. Population numbers have not been documented in New Mexico, and the impact of threats like oil/gas development, climate change, and herbicide application by roads is not certain. The species can be found growing in disturbed environments, however, suggesting that it may be somewhat resilient. |
| Ecological Factors | |
|---|---|
| Specificity: Moderate. Generalist or community with some key requirements scarce. | Range Extent: 1000-5000 square km (about 400-2000 square miles) |
| Occurences: 21 - 80 | Population Size: N/A |
| Area of Occupancy: N/A | Threat Summary: Energy production & mining - Low | Oil & gas drilling - Low |
State Status:
Observations in Natural Heritage New Mexico Database
Number of Subpopulations: 33
Number of Mapped Locations: 45
Number of Observations: 53
Observation date range: 06-21-1939 to 06-18-2019
External Links
View More Information about this species at:
NatureServe Explorer
New Mexico Rare Plants Website
Environmental Conservation Online System (ECOS)
NatureServe Explorer
New Mexico Rare Plants Website
Environmental Conservation Online System (ECOS)