Dendrobium agrostophyllum, the buttercup orchid, is an epiphytic or lithophytic orchid in the family Orchidaceae and has a creeping rhizome with well-spaced pseudobulbs. Each pseudobulb has up to twenty grass-like leaves, some of the leaves having flowering stems on the opposite side of the pseudobulb, each raceme with up to ten waxy, fragrant, bright yellow flowers. It grows in wet forest in coast areas of north Queensland, Australia.

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