and cucullate, remarkably thick and fleshy. In the hollow — 
of this, and from near the sinus at the base, the distichous _ 
raceme of flowers is produced, arising from a little mem- 
branous sheath, and closely appressed to the surface of the 
leaf. Bracteas membranaceous, circumvolute, shorter than 
the small pedicel. Flowers nearly erect. Leaflets or sepals 
of the calyx also erect, lanceolate, the two lateral, or infe- 
rior ones, combined for half their length and gibbous, deep 
blackish-purple, minutely papillose, within more inclining 
to red, or marked with minute, dark-coloured tubercles. 
Petals erect, spathulate, half the length of the sepals, of a 
deep rose colour, pale at the margin, toothed upwards. 
Lip erect, oblongo-lanceolate, dark purple-brown, minutely 
hispid at the point, with two small, incurved lobes near the 
base, which are ciliato-serrated. Column a little shorter 
than the petals, erect, slightly winged and serrated above, 
terminating in a membranous appendage (the elinandrium) 
_ within which the hemispherical yellow anther is situated. 
Pollen-masses two, obovate. Germen very short, jointed 
on the pedicel. 
Our collections are indebted for the possession of this 
very remarkable orchideous plant, to the Hon. and Rev. 
Wriuu4am Herserr, who received it from shady rocks at 
Boto Fogo, near Rio Janeiro. It flowers in June, and re- 
quires the same treatment as the other tropical parasites of 
the same family. In general structure the present species 
bears a great similarity with the P. saurocephalus, (Bot. 
Mag. t. 3030) which inhabits the same country. 
Tab. 1. Flower, 2. Flower, from which the sepals and lip are removed. 
8. Lip. 4. Anther-case. 5, Pollen-masses :—magnified. 
