Rostellum
Videos
The rostellum is a projecting part of the column in Orchidaceae flowers, and separates the male androecium from the female gynoecium, commonly preventing self-fertilisation. In many orchids, such as O
Cutaway drawing of Orchis mascula showing the rostellum projecting forward from the column to form cups which keep the adhesive balls sticky.
In the Catasetum flower an extension of the rostellum forms a narrow feeler or "antenna" projecting forward over the labellum.
Catasetum
Videos
Catasetum, abbreviated as Ctsm. in horticultural trade, is a genus of showy epiphytic Orchids, family Orchidaceae, subfamily Epidendroideae, tribe Cymbidieae, subtribe Catasetinae, with currently 200
Male flowers
Female flowers
Catasetum barbatum