Canada thistle (Carduus arvensis (L.) Robs.).
Contributors: United States. Divison of Botany; United States. Department of Agriculture
Series: U.S. Dept. of agriculture. Division of botany -- Circular no. 27; Circular (United States. Division of Botany) -- no. 27.
Publisher: [Govt. Print. Off.]
Published: 1900
Place of publication: Washington]
Language: eng
Number of pages: 14
Subjects: Canada thistle; Noxious weeds
Notes: "May 15, 1900."