Asclepias verticillata L. - Whorled Milkweed


 

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Asclepias verticillata - (image 1 of 4)

 

Taxonomy

Family: Asclepiadaceae

Habitat

Open, dry sites. Pastures, roadsides, abandoned fields. Dry hill prairies.

Associates

 

Distribution

MA south to FL, west to Saskatchewan, KS, and AZ.

Morphology

Perennial with fibrous roots and slender, erect stems 20-50 cm long. Leaves in whorls of 3-6, linear, less than 5 mm wide. Flowers white or greenish. Fruit slender, erect on erect pedicels, 7-10 cm.

Notes

Flowers June to September

Wetland Indicator: Upland

Due to its small stature and greenish-white flowers, this species may not be readily identified as a milkweed. 

References

Gleason, Henry A. and A. Cronquist. 1991. Manual of Vascular Plants of Northeastern United States and Adjacent Canada. Second Ed.
The New York Botanical Garden. Bronx, NY

 

Swink, F. and G. Wilhelm. 1994. Plants of the Chicago Region.
Indiana Academy of Science. The Morton Arboretum. Lisle, Illinois.

 


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Michael Hough 2004