Date: June 15, 2010. Location: HHoover NHS visitor center(map)
| Classification Hierarchy | |
| Kingdom | Plantae |
| Clade | Tracheophytes |
| Clade | Angiosperms |
| Clade | Eudicots |
| Clade | Asterids |
| Clade | Gentianales |
| Family | Apocynaceae |
| Subfamily | Asclepiadoideae |
| Tribe | Asclepiadeae |
| Genus | Asclepias |
| Species | Asclepias tuberosa |
Date: June 15, 2010. Location: HHoover NHS visitor center(map)
Scientific Name: Asclepias tuberosa (Asclepius [or Aesculapius] was the Greek god of healing; tuberosa = tuberous)
Common Name: Butterfly milkweed
Origin: Native
Notes: Most milkweeds exude a milky sap when wounded. However, the sap from this milkweed is clear.
Additional references: 1, 2, 3, 4, 5, 6, 7, 8.
Flowers: June, yellowish to red orange, pedicels and stems hirsute; inflorescence - terminal and axial umbels; fruit - upright pubescent follicles on deflexed pedicels, lance-fusiform.
Leaves: irregularly alternate - sometimes in small part opposite, linear-lanceolate to oblong-ovate, sessile or slightly petioled.
Glossaries of botanical terms: 1, 2, 3, 4, 5, 6, 7.
