Erasanthe is a genus of epiphytic orchids. It contains only one known species, Erasanthe henrici, endemic to Madagascar. Two subspecies are recognized:
- Erasanthe henrici subsp. henrici
- Erasanthe henrici subsp. isaloensis <small>P.J.Cribb, Hermans & D.L.Roberts</small> (synonym Aeranthes henrici var. isaloensis <small>H.Perrier ex Hermans</small>
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