LINDLEY ON PERUVIAN ORCHIDEX. 13 
cup, formed by the dilated cuneate margins of the column, 
with which the labellum is articulated. Its principal affinity 
is with Epidendrum, from which it is further distinguished by 
its four pyriform pollen-masses and hooded clinandrium. The 
exact nature of the powdery matter, that terminates the pollen- 
masses, I have not ascertained; it most probably indicates the 
presence of the replicate straps that characterize pidendree. 
9. Brassavola nodosa. Gen. et Sp. Orch. p. 114.—Near 
Cuenca, Colonel Hall. 
10. Maxillaria platypetala. Fi. Peruv. Syst. p. 221.— 
Camino Real, on banks, at the elevation of almost 6000 feet, 
upon the western declivity of the Andes, Colonel Hall. 
11. Oncidium* serpens; caule repente tortuoso filiformi 
ad nodos radicante pseudobulbifero, foliis oblongo-lanceolatis 
acutis pedunculis bifloris brevioribus, sepalis petalisq. obovatis 
obtusis planis zequalibus, labello oblongo obtuso, medio con- 
stricto basi bilamellato, columna marginata apice membrana- 
cea cucullata. Gen. et Sp. Orch. part. 3 ined.—Patacocha, 
on the road to Esmeraldas, at the height of 6000 feet, on trunks 
of trees; flowers yellow, spotted with dark brown, Col. Hall. 
12. Oncidium nubigenum ; pseudobulbis 1-2-phyllis, foliis 
lanceolatis acutis, scapo simplici paucifloro (3-10), sepalis 
lateralibus rectis semiconnatis petalisq. oblongis acutis un- 
* Another species was accidentally mixed up with the Peruvian Or- 
chidez, and, therefore, we insert it from Mr. Lindley's MSS. in a note. 
Oncidium viperinum; foliis lineari-lanceolatis acutis planis, scapo sim- 
plici cernuo flexuoso racemoso dense multifloro, sepalis lateralibus basi 
connatis divaricatis petalisq. latioribus lanceolatis undulatis recurvis acutis, 
labelli lobis lateralibus obsoletis denticulatis semisagittatis intermedio sub- 
rotundo-reniformi plano subbilobo, crista medio tuberculata basi et apice. 
bicorni, columnz alis parvis rotundatis. Gen. et Sp. Orch. part. 3, ined. 
— Only found on the bark of very old trees, and requires more nourish- 
ment than any of the other species: Paraguay, Mr. Tweedie. Near O. 
bifolium. : 
