Haptanthus hazlettii genus novum monotypicum is described. The plant is a dicotyledon with a combination of characters not found in any family. The inflorescences consist of a single central carpellate flower and two branches of 5-6 staminate flowers each. The flowers lack a perianth, merely being subtended by a minute bracteole. The staminate flowers are monandrous and the carpellate flowers have a tricarpellate, stipitate pistil with three large sessile stigmas and ovary with three parietal placentas, each with 8-15 ovules in two ranks. The plant is a completely glabrous shrub. The leaves are opposite, simple, entire and not glandular punctate. Stipules are absent and no stipular scars are evident.
Systematic Botany publishes original articles pertinent to modern and traditional aspects of systematic botany, including theory as well as application.
Organized in 1935 to foster, encourage, and promote education and research in the field of plant taxonomy, to include those areas and fields of study that contribute to and bear upon taxonomy and herbaria.