It has crowded pseudobulbs each with a single thin, leathery, dark green leaf and a single white, green or cream-coloured flower with red or purplish markings.

It occurs from south-eastern Queensland to Dorrigo National Park in New South Wales.

[2][3] Bulbophyllum weinthalii was first formally described in 1933 by Richard Sanders Rogers and the description was published in Transactions and Proceedings of the Royal Society of South Australia from a specimen collected by "Mr. F.A.

The specific epithet (weinthalii) honours the collector of the type specimen.

[4][5] There are two subspecies: The wax orchid grows on the scaly bark on the upper branches of hoop pine in rainforest between the Kroombit Tops National Park in Queensland and the Dorrigo National Park in New South Wales.