Perennial rye-grass (Lolium perenne)
By: Lyman Carrier
Series: Department circular / United States Department of Agriculture -- 42; Department circular (United States. Dept. of Agriculture) -- 42.
Publisher: U.S. Dept. of Agriculture
Published: 1919
Place of publication: Washington, D.C
Language: eng
Subjects: Grasses
Other titles: Perennial rye grass (Lolium perenne)
Notes: "Contribution from the Bureau of Plant Industry, Forage-Crop Investigation."