A revision of the North American species of Verbena
By: by Lily May Perry.
Series: At head of title:  Washington university doctoral dissertations.
Publisher: Washington university
Published: 1933
Place of publication: Saint Louis
Language: eng
Number of pages: 362
Subjects: Verbena.
Notes: Thesis (PH. D.)--Washington university, St. Louis, 1932.
"Reprinted from Annals of the Missouri botanical garden, April, 1933, vol. xx, no. 2."