The waterlilies: a monograph of the genus Nymphaea - Conard, Henry S. (Henry Shoemaker), 1874 -1971 (Pub. by the Carnegie Institution of Washington, 1905)

Waterlilies, aquatic plants, perennial borders : ornamental fishes for pools and aquariums - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (The Independence Nurseries Co, 1926)

The waterlilies: a monograph of the genus Nymphaea - Conard, Henry S. (Henry Shoemaker), 1874 -1971 (Published by the Carnegie Institution of Washington, 1905)