KEY TO PANAMANIAN SPECIES Of PSILOCHILUS

1. Leaves sessile or subsessile, petiole less than 5 mm long,............................................................................ 2

2. Lip claw inconspicuous, about 1/4 of the total lip length................................................ P. macrophyllus (Lindl.) Ames

2. Lip claw prominent, constituting almost half of the total lip length................................................... P. dressleri Kolan.

1. Leaves distinctly petiolate, petiole more than 5 mm long............................................................................ 3

3. Lip middle lobe prominent, 6– 6.5 + 3 mm, ovate to elliptic...................................................... P. panamensis Kolan.

3. Lip middle lobe short, 4 + 3 mm, suborbicular...................................................... P. physurifolius (Rchb. f.) Løjtnant