Poisonous properties of the whorled milkweeds Asclepias pumpila and A. Verticillata var. geyeri
By: by C. Dwight Marsh and A.B. Clawson
Contributors: Clawson, A. B.
Series: Bulletin / United States Department of Agriculture -- no. 942; Bulletin of the U.S. Department of Agriculture -- no. 942.
Publisher: U.S. Dept. of Agriculture
Published: 1921
Place of publication: Washington, D.C
Language: eng
Number of pages: 14
Subjects: Milkweeds; Livestock poisoning plants
Notes: Caption title.

"May 4, 1921."

"Professional paper."