"The Orchidoideae, or the orchidoid orchids, are a subfamily of the orchid family (Orchidaceae).
They typically contain the orchids with a single (monandrous), fertile anther which is ...
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erect and basitonic.
The subfamily Orchidoideae and the previously recognized subfamily Spiranthoideae are considered the closest allies in the natural group of the monandrous orchids because of
a shared terrestrial habitsectile (capable of being severed) or granular polliniaerect anthers.The Orchidoideae contain two subclades with the following tribesĀ :
tribes Orchideae and Diseaetribes Cranichideae, Chloraeeae and DiurideaeThe former subfamily Spiranthoideae is now embedded as tribe Cranichideae in the clade of the Orchidoideae. It is sister to the tribe Diurideae." - (en.wikipedia.org 19.09.2020)