Robert L. Dressler

A NEW AND BIZARRE SPECIES IN THE GENUS CONDYLAGO (ORCHIDACEAE: PLEUROTHALLIDINAE) FROM PANAMA

ABSTRACT Condylago furculifera from Panama is described and illustrated. This species is distinguished from its Colombian relative, C. rodrigoi, by more sparsely villous sepals (vs. densely white-villous); obovate-pan-durate petals without decurrent basal lobes and the ovate (vs. orbicular) viscid callus. The most striking feature, however, is the inflorescence with persistent, Y-shaped, flattened pedicels, each articulated to an “epipedicel” to 2 cm long. Colombian photographs suggest that C. rodrigoi also has an epipedicel between the pedicel and the flower, but the pedicel is much simpler. This epipedicel is of special interest, as the Pleurothallidinae are usually characterized by having the ovary articulated directly to the pedicel. A key to the species is given.

SOME PROBLEMS IN TRICHOPILIA (ORCHIDACEAE: ONCIDIINAE) WITH TWO NEW SPECIES OF MODEST FLOWER SIZE

ABSTRACT The taxonomy of several species of Trichopilia sect. Trichopilia with small, mostly white flowers is discussed. Two new species, T. endresiana and T. tubella, are described and illustrated. Both new species are closely allied to T. turrialbae, but can be distinguished by the smaller flowers and the lateral keels of the lip subequally branched to clasp the small osmophores in acute angles, and by the lip distinctly longer than the sepals and the smooth area of the osmophores, respectively.

A Nomenclatural Note on Cypripedium humboldtii (Orchidaceae: Cypripedioideae)

Abstract. The long-petaled slipper orchid of Central American has a complex nomenclatural history. Since the first publication of the name Cypripedium humboldtii, this plant has been treated under a number of different synonyms. Here we reconsider the oldest name, suggesting that Warszewicz validly published it, and that the name Phragmipedium humboldtii must be used for this taxon.

A new species of Ornithocephalus (Orchidaceae) from Panama

Ornithocephalus aristatus, a new species from Panama, is described and illustrated. Among the species of the genusOrnithocephalus, 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, crose lateral lobes, the linear, acute midlobe, conduplicate and subreflexed at apex, and the dise with a bilobed, obreniform callus provided with a conical tuft of stiff hairs. A key to the species ofOrnithocephalus from Panama is provided.

Sobralia turrialbina (Orchidaceae: Sobralieae): Long Cultivated and Now Described

Abstract. Sobralia turrialbina is described and illustrated from Costa Rica. The new species is compared with the morphologically similar S. chrysostoma, from which can be distinguished by the leaves restricted to the terminal third of the stem, the floral bracts twice longer, the flowers dusty pink or pale rose, and the lip with no keels, provided with a hazelnut-brown gorge and the apical margin finely striped with rose-purple. Notes on species distribution, habitat and ecology, and etymology are provided.