Botanical abstracts - Board of Control of Botanical Abstracts. (Williams & Wilkins Co, 1921)

Descriptions of three hundred new species of South American plants, with an index to previously published South American species by the same author - Rusby, Henry Hurd, 1855 -1940 (The Author, 1920)

Descriptions of three hundred new species of South American plants :with an index to previously published South American species by the same author - Rusby, Henry Hurd, 1855 -1940 (Henry Hurd Rusby, 1920)