ABSTRACT:

Piptospatha helix S. Y. Wong & P. C. Boyce is described from Kalimantan Barat, Indonesian Borneo, and compared with the four pre-existing species with which it shares green pistils. A key to all Piptospatha species with green pistils is provided, Piptospatha helix is figured from living plants, and from the nomenclatural Isotype, and a comparative plate of the spadix of all Piptospatha species with green pistils is given.