Asclepias tuberosa var. interior

Classification	Dicots
Family	Apocynaceae
Family (Traditional)
Genus	Asclepias
Species:	Asclepias tuberosa
Infraspecies:	Asclepias tuberosa (Woods.) Shinners var. interior
Common Name	Butterfly Milkweed
Growth Habit	forb
Plant Notes	**
Characteristics	Armaments: No; Milky Sap: No; Photosynthetic: Yes; Stipules: No; Woody Herbaceous: Herbaceous; Duration: Perennial; General Ecology: Terrestrial; Growth Habit: forb; Region of Origin: North America; Reproductive Phenology: May; Reproductive Phenology: June; Reproductive Phenology: July; Reproductive Phenology: August; Reproductive Phenology: September; Leaf Arrangement: alternate; Leaf Complexity: simple; Leaf Dissection: 0; Leaf Fragrance: No; Leaf Persistance: Deciduous; Leaf Petiole Type: petiolate; Leaf Type: broadleaf; Leaf Venation: pinnate; Leaflet Margins: entire; Leaflet Number: 0; Anther Type: Pollinium; Base Flower Color: Orange; Carpel Number/Pistil: 2; Fruit Complexity: Multiple; Fruit Dehiscence: Yes; Fruit Type: Follicle; Fruit Wet/Dry: Dry; Hypanthium Present: No; Inflorescence Position: axillary; Inflorescence Position: terminal; Inflorescence Types: corymb/cyme/umbel; Ovary Position: Superior; Overall Flower Symmetry: Actinomorphic; Ovules per Carpel: 13+; Perianth Present: Yes; Pistil Complexity: Compound; Pistil Number: 1; Placentation Type: Marginal; Sepal Fusion: Yes; Sepal Number: 5; Sexuality: monoclinous; Sporangium Arrangement: N/A; Stamen Number: 5
C value	4
Status	Native

** Not applicable or data not available.

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Species Distribution Map

This species has been reported in the counties highlighted in the interactive distribution map below. Click on a county to display the its name. Click the question mark icon () to view additional information about the ecoregions shown. In the map legend, there are links to toggle the visibility of the ecoregions and/or their labels. In addition, clicking on an ecoregion name will highlight that region on the map.

State Boundaries
Counties
Counties - Species Present

Ecoregions

Southeastern Plains
- Blackland Prarie
Blue Ridge Mountains
Ridge and Valley
Cumberland Plateau
Cumberland Mountains
Allegheny Plateau

Interior Plateau
- Bluegrass Region
- Nashville Basin
- Pennyroyal Karst Plain
- Western Highland Rim
- Eastern Highland Rim

Interior River Valleys and Hills
- Shawnee / Caseyville Hills
Mississippi Alluvial Plain
Mississippi Valley Loess Plains
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Synonyms

Synonym	Full Citation
Asclepias tuberosa f. lutea	Asclepias tuberosa f. lutea Clute
Asclepias tuberosa subsp. interior	Asclepias tuberosa subsp. interior Woodson
Asclepias tuberosa subsp. terminalis	Asclepias tuberosa subsp. terminalis Woodson
Asclepias tuberosa var. interior	Asclepias tuberosa var. interior (Woods.) Shinners