Eranthemum is a genus of flowering plants in the family Acanthaceae, within the order Lamiales. Described by Carl Linnaeus in 1753, the genus comprises 23 accepted species, along with several historical synonyms recognized under other generic names, including Citharella, Daedalacanthus, and Upudalia.
Species in the genus are native to tropical and subtropical Asia, with a distribution spanning the Indian subcontinent, Indochina, southern China, and the islands of Sumatra and Java. Occurrence records also place native populations in the Andaman Islands, Assam, Bangladesh, Cambodia, the East Himalaya, Laos, and Myanmar. Several species have additionally become naturalized well outside this native range, with introduced populations recorded in Florida, Cuba, the Dominican Republic, Haiti, Jamaica, the Leeward Islands, El Salvador, the Lesser Sunda Islands, and the Marianas — a reflection of the genus's popularity in cultivation as an ornamental.
As with other Acanthaceae genera, Eranthemum species are typically shrubby or herbaceous plants grown for their showy tubular flowers. The GBIF backbone taxonomy records 62 descendant taxa (species and infraspecific names) associated with the genus, reflecting a history of taxonomic revision and synonymy within the group.
Distribution
Eranthemum is native to tropical and subtropical Asia, spanning the Indian subcontinent, Indochina, southern China, and the islands of Sumatra and Java. Several species have also naturalized outside this range, with introduced populations recorded in Florida, the Caribbean (Cuba, Dominican Republic, Haiti, Jamaica, Leeward Islands), Central America (El Salvador), and Pacific islands (Marianas, Lesser Sunda Islands).
Taxonomy Notes
The genus was described by Linnaeus in 1753. It has accumulated several synonymous generic names over its taxonomic history, including Citharella (a nomen nudum), Daedalacanthus, and Upudalia. GBIF's backbone taxonomy lists 62 descendant names under the genus, reflecting extensive historical synonymy and species-level revision within Acanthaceae.
