A Monograph of the Subtribe Polystachyinae Schltr. (Orchidaceae). 2011. 96 col. pls. Many line figs. 238 dot maps. 400 p. 4to. Hardcover.

10 genera and 232 species are recognized within the Polystachyinae.Polystachya, with 196 species, is the largest genus of the subtribe and 13 sections are recognized within it. A synopsis of the subtribe isprovided. Comprehensive descriptions, full synonymy, illustration offlower parts, distribution maps, detailed ecological, phenologicaland distribution data are provided for each taxon treated and a list of5480 examined specimens from the whole range of of distribution of thesubtribe were analysed in detail. Keys to the genera, species of particular genera, sections and subsections and regional keys forthe Asian, American and African species of Polystachya. Two new species,five new sections and six new subsections are described, plus two newcombinations.