Pupulin, F. & R. L. Dressler. 2006. A new species of Ornithocephalus (Orchidaceae) from Panama. Brittonia 58(4): 314-317.

Abstract. Ornithocephalus aristatus, a new species from Panama, is described and illustrated. Among the species of the genus Ornithocephalus, it can be distinguished by the nonresupinate flowers, the sepals each provided with a flexuous awn half as long as the sepal itself, the porrect petals with revolute margins, the hastate lip with triangular-ovate, erose lateral lobes, the linear, acute midlobe, conduplicate and subreflexed at apex, and the disc with a bilobed, obreniform callus provided with a conical tuft of stiff hairs. A key to the species of Ornithocephalus from Panama is provided.
Key words: Oncidiinae, Orchidaceae, Ornithocephalus, Ornithocephalus aristatus, Panama

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