Corybas acuminatus (Orchidaceae) — a new name for the species previously considered to be Corybas rivularis

The type material of Acianthus rivularis A. Cunn. is identical with the species currently called Corybas orbiculatus (Col.) L. B. Moore, leaving the species mistakenly known as Corybas (Corysanthes) rivularis without a name. This species is here described as Corybas acuminatus , and Corybas orbiculatus becomes a synonym of Corybas rivularis .