Corsiaceae is a family of monocotyledonous flowering plants. The APG II system (2003) treats the family in the order Liliales, in the clade monocots. This is a slight change from the APG system, of 1998, which left the family unplaced as to order, but did assign it to this same clade.
The family is usually taken to include three genera, Corsia, Corsiopsis, and Arachnitis. As the members of this family are non-autotrophic herbs (i.e. they are not green, and do not photosynthesize) they have sometimes been included in the family Burmanniaceae which, however, according to APG II is not even in the same order. The APG companion site cites a reference which suggests the family should consist of Corsia only, with Arachnitis better placed nearer to family Burmanniaceae. Corsiopsis, like Arachnitis a monotypic genus, has been described recently.
The phylogenetic position of subfamily Monotropoideae (Ericaceae) inferred from large ribosomal subunit (26S) rRNA gene DNA sequences.(Report)
Apr 01, 2011; INTRODUCTION Obligate myco-heterotrophs are non-green plants that obtain fixed carbon from fungi (Bidartondo and Bruns, 2002)....