Verlag Koeltz Botanical Books

Vanishing Beauty: Native Costa Rican Orchids.

Distribution atlas of submerged macrophytes along the German Baltic Sea coastline.

The Robert Brown Handbook

Flowers of Greece

A Century of New Orchid Records in Bhutan

Orchidaceae of West - Central Africa. (Southern Chad, Cameroon, Central African Republic, Sao Tomé and Principe, Equator

Diatom Monographs / Monoraphid and Naviculoid diatoms from the Coastal Laurentian Great Lakes.

Wild Orchids of the East-Central United States (Delaware, Indiana, Kentucky, Maryland, North Carolina, Ohio, Tennessee,

The Odontoglossum Story

Diatoms of Europe. Diatoms of the European Inland Waters and Comparable Habitats Elsewhere / Freshwater Diploneis