Epigeneium (Orchidaceae) of Java and Sumatra

Abstract

Study on Epigeneium (Orchidaceae) in Java and Sumatra was conducted based on herbarium and living collections. Specimens from Herbarium Bogoriense (BO) and Herbarium Singapore Botanic Garden (SING) were observed during this study. Photo images of specimens and types from Leiden (L), Oakes Ames Orchid Herbarium (AMES), and Kew (K) were have been incorporated. Other additional specimens were from Andalas University Herbarium (ANDA). Based on morphological characters, Epigeneium has been revised into five species of Epigeneium from Java: E. arjunoense, E. cymbidioides, E. elongatum, E. geminatum, and E. triflorum. Epigeneium elongatum previously was placed as one of the variety of E. triflorum, now it has been placed back to species level because there are some distinct characters from the other two varieties were observed. In Sumatra there was one new record, E. geminatum since this species was never been found in this island before. Two new species were proposed from Sumatra: E. longibulbon Destri sp. nov. and E. sikijangensis Destri sp. nov. Epigeneium longibulbon was named base on its long pseudobulb, and E. sikijangensis was named after the original habitat where this orchid was collected (Rawa Sikijang), located at Mt. Kerinci, Jambi province.