Thrixspermum obyrneanum (Aeridinae), a new species from Peninsular Thailand and Malaysia

Abstract

Thrixspermum obyrneanum (sect. Thrixspermum) is a new species described from Narathiwat Province, southern Thailand, and from Kelantan, Peninsular Malaysia. It is morphologically similar to T. leucarachne but differs in the much shorter sepals and petals, tepals and lip pale yellow, lateral lobes of the lip 6–7 mm long, broadly triangular to ovate, with narrowly truncate and erose apex, mid-lobe 3.0–4.7 mm long, cylindrical to broadly triangular, obtuse.