The Genus Phalaenopsis, (The Orchid Digest, Orchids of the World Volume 1), Herman R. Sweet Ph.D. 1980.

Descriptions, distribution, and observations of the genus Phalaenopsis, including sections Phalaenopsis, Proboscidoides, Aphyllae, Polychilos, Stauroglottis, Fuscatae, Amboinensis, and Zebrinae. Lip illustrations of most species.  Many color plates and illustrations.  

Condition is Good.  Has clear dust jacket.  Slight wear along edges.  Some discoloration from age, notably along spine.  Condition of pages is very good. 

128 pages.