Bulbophyllum of Borneo

Die Orchideen Bayerns – Verbreitung, Gefährdung, Schutz

Wild Orchids of the Algarve (2014)

The Wild Orchids of Taiwan, an Illustrated Guide (2014)

Lehrbuch der Pflanzenwissenschaften (2014)

…of men and orchids… (Band 1)

Thüringens Orchideen (2014)

The Stanhopea Book (2010)

Orchid seed diversity – A scanning electron microscopy survey (2014)

Dank-o-pedilum Spezial (2015) – Paphiopedilum Naturformen