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Hall's milkweed
Scientific Name: Asclepias hallii
Family: Asclepiadaceae
Category: Dicot
Growth: Forb/herb
Duration: Perennial
Other Names:
Hall's Milkweed (Asclepias hallii)
Considerations for Pets
- Hall's Milkweed contains sap, a characteristic of the Asclepias genus.
Considerations for Children
- Hall's Milkweed contains sap, a characteristic of the Asclepias genus.
Common Names
- Hall's Milkweed
- Hall Milkweed
- Purple Silkweed
Taxonomy and Nomenclature
- Scientific Name: Asclepias hallii A. Gray
- Family: Asclepiadaceae (Milkweed Family)
- Synonym: ASHA6 (USDA Symbol)
- Rank: Species
Distribution and Habitat
- Native to the Rocky Mountain West.
- Native to Nevada, and Arizona.
Ecological Role
- Serves as a host and nectar source for Monarch butterflies.
Morphological Characteristics
- Hall's Milkweed is a perennial herb.
- It has spreading rootstocks.
- The stem is typically 2-5 dm (20-50cm) tall, but can reach 8 dm (80cm).
- The stem may be branched near the base.
- It produces dense pale purplish-pink and cream flower umbels.
- The leaves are broad, lanceolate-oval, and greyish-green.
Quirky Facts
- The plant is named for Elihu Hall, an early botanist from Illinois who collected specimens in South Park in 1862.
Interactions with Other Organisms
- Monarch butterfly larvae feed exclusively on milkweed plants (Asclepias spp.).
- Honey bees are known to forage on milkweed.
Further Information
- Dave's Garden
- USDA Plants Database
- Plant database entry for Hall's Milkweed (Asclepias hallii) with 11 data details.