Ba Vuong Truong, Quang Tam Truong, Jan Ponert & Jaap J. Vermeulen
Bulbophyllum thydoii Photos: Jan Ponert
Abstract: Bulbophyllum thydoii is described as a new species of sect. Brachyantha. This species is morphologically close to Bulbophyllum umbellatum and differs by the synanthous inflorescence, petals which proximally do not overlap with the lateral sepals and larger flowers with median sepal 15 - 20 mm long.
Bulbophyllum thydoii resembles Bulb. umbellatum LINDL., Genera and species of Orchidaceous plants: 56, 1830, and Bulb. elatum (HOOK. F.) J. J. SM., Bulletin du Jardin Botanique de Buitenzorg ser. 2, 8: 23, 1912. It differs by the synanthous inflorescences (heteranthous in Bulb. umbellatum and Bulb. elatum), and by the petals which do not touch the lateral sepals proximally (overlapping with the lateral sepals in Bulb. umbellatum and Bulb. elatum). In addition, Bulb. thydoii has larger flowers than Bulb. umbellatum (median sepal 15 – 20 mm long, versus ca. 9 mm long).
It grows on trunk or branches, usually associated with Cleisocentron klossii (RIDL.) GARAY, Campanulorchis longipes (GAGNEP.) J. PONERT, Eria lactiflora AVER. and Mycaranthes floribunda (D. DON) S. C. CHEN et J. J. WOOD. Flowering time March until late of March.
Published in Die Orchidee 5(06), 2019/E-Paper