Dioscoreales

The Dioscoreales are an order of monocotyledonous flowering plants, organized under modern classification systems, such as the Angiosperm Phylogeny Group or the Angiosperm Phylogeny Web. Among monocot plants, Dioscoreales are grouped with the lilioid monocots, wherein they are a sister group to the Pandanales. In total, the order Dioscoreales comprises three families, 22 genera and about 850 species.

thumb|Thismia rodwayi

REDIRECT Tacca

Relictithismia kimotsukiensis is a species of fairy lanterns. It is placed either in the family Thismiaceae, or in the family Burmanniaceae by those who do not recognize Thismiaceae. It is the only species in the genus Relictithismia. This mycoheterotrophic plant is known only from the Kimotsuki Mountains, in the Ōsumi Peninsula, Kagoshima Prefecture, Kyushu Island, in the southern Japan. The species is assessed as Critically Endangered based on IUCN Guidelines.