58 
longis compressis diphyllis, foliis lato-oblongis planis 
acutis scapo squamis carinatis vaginato brevioribus, ra- 
cemo stricto disticho, bracteis navicularibus acuminatis 
membranaceis, sepalis petalisque lineari-lanceolatis acu- 
minatissimis, labello cordato acuminatissimo integerrimo 
appendice baseos carnosa apice biloba basi utrinque dente 
unico auctà, column pubescente clavatä subapterà.—— 
Mexico.——Sepals and petals richly blotched with brown 
upon a yellowish green ground. Lip white, with the 
crest at the base purplish, and the apex spotted and 
blotched with rich brown. 
b. Columne auriculis linearibus, longioribus quam latis, 
y. cirrhosis. 
94. O. cristatum (Lindl in Benth. Pl. Hartweg. p. 152); 
foliis lineari-lanceolatis acutissimis scapo multifloro sim- 
plici paullo brevioribus, sepalis petalisque lanceolatis 
acuminatis, labello lanceolato acuminato geniculato basi 
lamina multifida cristato, columna elongata basi membra- 
naceo-marginata apice alis duabus uncinatis, anthera 
cristata.—— Peru.— Flowers spotted with brown, about 
as large as those of O. cordatum. Leaves very narrow. 
35. O. cirrhosum (Lindl. in Hooker. Bot. Mise. Gen. & Sp. 
Orch. no. 2); sepalis lanceolatis petalisque latioribus 
undulatis acuminatissimis maculatis labello longioribus, 
labelli laminá cordatà acuminatissimá, columnà apice 
apterá bicirrhosá.—— Guayaguil.—— Nothing more is 
known of this remarkable plant than could be gathered 
from the examination of a few dried flowers. They 
appear to be yellow, with some broad purplish blotches. 
36. O. Hallii (Lindl. in Bot. Reg. sub t. 1992); pseudobulbis 
ovatis acuminatis ancipitibus, foliis ensiformibus in basin 
angustatis, scapo paniculato, sepalis petalisque ovato- 
lanceolatis acuminatis unguiculatis, labello oblongo acu- 
minato pectinato ; cristá baseos lamellatá multifidä, co- 
lumnæ alis bidentatis dente superiore aristato. Peru. 
—— A most beautiful species. Flowers blotched with 
brown upon a yellow ground, three inches and a half in 
diameter. Mr. Hartweg brought it from the western 
declivity of Pichincha. 
37. O. rigidum (Lindl. in Benth. Pl. Hartweg, p. 152) ; foliis 
oblongis basi angustatis scapo rigido paniculato breviori- 
