Palouse Milkvetch
Astragalus arrectus
Taxonomy
- Division:
- Magnoliophyta | - Flowering plants
- Family:
- Fabaceae
- Genus:
- Astragalus
- Species:
- Astragalus arrectus
Growth Characteristics
- Life Cycle:
- Perennial
- Growth Habit:
- Forb/herb
- Height:
- Less than 6 in
- Light Requirements:
- Full Sun
- Drought Tolerance:
- High
- Bloom Months:
- apr, may, jun, jul
- Bloom Colors:
- White, Yellow
Native Range
United States: Idaho, Washington
Keystone Species Ranking
- Bee Keystone:
- ★★★☆☆ Based on number of native bee species using this genus for pollen and nectar (Source: National Wildlife Federation)
Soil Requirements
- Soil Type:
- sandy, well-drained, nutrient-poor soil
- pH:
- 6.0 - 8.0 (slightly acidic to neutral)
- Drainage:
- excellent drainage required
- Moisture:
- dry to moderate
Germination Information
Pre-treatment: Scarification of seeds either by hot water or rubbing between two pieces of sandpaper. The latter method yielded higher germination rates.
Establishment: Seed collection is in late July or early August when the pods begin to split open and the seed is hard and brown. The plant is endemic to eastern Washington and adjacent parts of Idaho.
Source: npn.rngr.net