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Aa is a genus of plants of the family Orchidaceae.
Species in this genus can be found growing terrestrially in cold habitats near the snowline in the Andes and also in Costa Rica; they are usually found close to small streams. The elongated inflorescence grows from a basal rosette of leaves, terminating in a small white non-resupinate flower. This lip is fringed and hood-shaped. The flower gives off a pungent smell that attracts flies. This genus has often been included in the orchid genus Altensteinia.
Aa achalensis · Aa argyrolepis · Aa aurantiaca · Aa calceata · Paper Orchid · Aa denticulata · Aa erosa · Aa fiebrigii · Aa figueroi · Aa hieronymi · Aa lehmannii · Aa leucantha
Text excerpted from the Wikipedia article Aa (plant) by its contributors, under CC BY-SA 4.0; the excerpts are shared under the same licence.
