Maxillaria

"A posthumous work. Volume 1 covers species A to L, and volume 2 the remaining species. Eric Alston Christenson (1956-2011) was one of the most active orchid taxonomists of modern times, and one of the foremost experts on the taxonomy of Maxillaria. He published at least 7 genera, 35 subgeneric taxa (subgenera and sections), 461 new species and generic transfers, and 94 infraspecific taxa of orchids (16 sections, 80 species, and 5 infraspecific taxa in Maxillaria alone). A few years before his death, Eric began to work on a monograph of Maxillaria."--Koeltz website.