Didymoplexis
Encyclopedia
Didymoplexis is a genus
of 17 species of leafless, achlorophyllous orchids. Their rhizome
s have aerial roots. Flowers are solitary, resupinate, and arranged into terminal or subterminal raceme
. In particular, one dorsal sepal
is fused with the petal
s forming a hoodlike structure.
Genus
In biology, a genus is a low-level taxonomic rank used in the biological classification of living and fossil organisms, which is an example of definition by genus and differentia...
of 17 species of leafless, achlorophyllous orchids. Their rhizome
Rhizome
In botany and dendrology, a rhizome is a characteristically horizontal stem of a plant that is usually found underground, often sending out roots and shoots from its nodes...
s have aerial roots. Flowers are solitary, resupinate, and arranged into terminal or subterminal raceme
Raceme
A raceme is a type of inflorescence that is unbranched and indeterminate and bears pedicellate flowers — flowers having short floral stalks called pedicels — along the axis. In botany, axis means a shoot, in this case one bearing the flowers. In a raceme, the oldest flowers are borne...
. In particular, one dorsal sepal
Sepal
A sepal is a part of the flower of angiosperms . Collectively the sepals form the calyx, which is the outermost whorl of parts that form a flower. Usually green, sepals have the typical function of protecting the petals when the flower is in bud...
is fused with the petal
Petal
Petals are modified leaves that surround the reproductive parts of flowers. They often are brightly colored or unusually shaped to attract pollinators. Together, all of the petals of a flower are called a corolla. Petals are usually accompanied by another set of special leaves called sepals lying...
s forming a hoodlike structure.
List of species
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