Oncophyllum

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Oncophyllum is a tiny genus of orchids found only in Australia, with just two species: Oncophyllum globuliforme and Oncophyllum minutissimum. It used to be placed in Bulbophyllum. The genus was described in 2001 by D. L. Jones and M. A. Clements after noting distinctive features: very small pseudobulbs with a tiny cavity near the top, a single tiny leaf-like structure on each pseudobulb, a single-flowered inflorescence arising from the base of the pseudobulb, and small flowers with a warty ovary. They grow in a range of habitats from very exposed to relatively sheltered, are pollinated by insects, and are fairly easy to grow on a hard slab with bright light, high humidity, good air movement, and regular watering year-round. The name Oncophyllum combines roots meaning “barbed hook” (onco) and “leaf” (phyllum). The type species was originally described as Bulbophyllum minutissimum. In conservation terms, Oncophyllum globuliforme is considered vulnerable, while Oncophyllum minutissimum is widespread and common in Queensland and New South Wales, from the Blackdown Tableland to Bateman’s Bay.