Column (botany)
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The column, or technically the gynostemium, is a reproductive structure that can be found in several plant families: Aristolochiaceae, Orchidaceae, and Stylidiaceae.
Flower of Stylidium turbinatum, showing the column.
Labellum (botany)
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In botany, the labellum is the part of the flower of an orchid or Canna, or other less-known genera, that serves to attract insects, which pollinate the flower, and acts as a landing platform for them
Showy lady slipper (Cypripedium reginae) has a pink labellum
Labellum of a Phalaenopsis hybrid
Orchis italica, the naked man orchid, showing a labellum divided into several lobes
Labellum of the orchid Laelia superbiens, showing five wavy ridges of the callus