Maxillaria crassifolia, synonyms including Heterotaxis sessilis, is an epiphytic orchid widespread across the West Indies (Cuba, Hispaniola, Jamaica, Trinidad), Central America (all 7 countries), southern Mexico (Chiapas, Veracruz, Oaxaca, Quintana Roo), Florida and northern South America (Colombia, Ecuador, Peru, northern Brazil, Venezuela, the Guianas). Hidden orchid is a common name.
Some molecular studies have suggested that Maxillaria should be split into several genera, with this species moved to Heterotaxis, but , Plants of the World Online treats Heterotaxis as a synonym of Maxillaria.