Poisonous properties of the whorled milkweeds Asclepias pumila and A. verticillata var. geyeri.
By: By C. Dwight Marsh ... and A.B. Clawson ...
Contributors: Clawson, Arthur Brooks, 1878- [from old catalog] joint author.
Series: U.S. Dept. of agriculture. Bulletin -- no. 942. -- Professional paper [from old catalog]
Publisher: [Govt. print. off.]
Published: 1921
Place of publication: Washington
Language: eng
Number of pages: 14
Subjects: Milkweeds.