This is the third volume in a series of research papers into Australian orchidaceae. This publication concentrates on the orchids found in Tasmania. Includes taxonomic review of the following genera in Tasmania: Caladenia, Chiloglottis, Diuris, Genoplesium, Prasophyllum, Pterostylis and Thelymitra. Includes a complete checklist. Contains 64 colour photos and 62 line drawings. Details 180 taxa of Tasmanian orchidaceae with 44 new species and 2 sub species.