Astragalus and its segregates as represened in Colorado
By: by Per Axel Rydberg
Series: Contributions from the New York Botanical Garden -- v. 76
Publisher: Torrey Botanical Club
Published: 1906
Place of publication: New York
Language: eng
Number of pages: 668
Subjects: Astragalus (Plants); Botany
Other titles: Rybergiana.; Bulletin of the Torrey Botanical Club.
Notes: Spine title: Rybergiana.

Title from cover.

Reprinted from the Bulletin of the Torrey Botanical Club, vol. 32, 1906.

With: Studies on the Rocky Mountain flora. I-XXIII / P.A. Rydberg. New York : [Torrey Botanical Club], 1900-1910. Bound together subsequent to publication.