Materials to the Orchid Flora of Colombia, Vol. IV

Vanishing Beauty – Native Costa Rican Orchids, Volume 3: Restrepia – Zootrophion und Appendices

Verstörend betörend ‒ Im Bann der Orchidee

Flora des Chiemgaus – Orchideen

Beiträge zur Gattung Ophrys

A Compendium of Miniature Orchid Species Vol. 1 – 4

Orchid Spezies from Himalaya and Southeast Asia Vol.1

Wild Orchids of the Southwestern United States – a Field and Study Guide
With original artwork by Stan Folsom

Orchids of Romania

Paphiopedilum — Südostasiatische Frauenschuhe Band 1