Geosiris
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Geosiris aphylla Baillon, sometimes called the "earth-iris", is an unusual species in the iris family Iridaceae. Native to Madagascar and other islands in the Indian Ocean, it is a small mycotrophic saprophyte lacking chlorophyll. It is the sole member of the genus.
Its rhizomes are slender and scaly, and stems are simple or branched. The leaves are alternate, but having no use, are reduced and scale-like.
In 1939, Jonker assigned Geosiris to its own family Geosiridaceae in Orchidales, and this was adopted in the Conquist system, with a note that the family was closely related to Iridaceae or Burmanniaceae. The Angiosperm Phylogeny Group has since subsumed the family into Iridaceae.