8 LINDLEY ON PERUVIAN ORCHIDE.E. 
which it is chiefly distinguished by its posterior labellum con- 
nate with the column, like that of an Epidendrum. lam un- 
certain if this genus is not the same as Zlleanthos of Presl. 
l. Hexisea bidentata.—Hab. in Panama et Columbia oc- 
cidentali, Cuming. (hab. s. sp.) 
Caules teretes, 6-8-poll. longi. Folia 4 poll. longa, 21 lin. 
lata. F/ores glaberrimi, Ornithidio coccinei fere magnitudine. 
Sepala et petala lineari-lanceolata, acuta. Labellum subcon- 
forme, sed apicem versus paulo dilatatum. <Auricule columnz 
bidentate. 
In this plant, the petals are often deformed, so as to be 
either abbreviated, or truncated, or falcate, or toothed. Their 
natural form is, no doubt, such as I have described. 
NOTES UPON A SMALL COLLECTION OF PERUVIAN 
ORCHIDE®. DE Puorssson LINDLEY. 
No better example of the inexhaustible riches of Peruvian 
Orchideous plants need be adduced than the following, where, 
among fifteen species, two only have before been described ; 
and while one is a genus totally different from any previously 
known, another is perhaps scarcely referable to the genus | 
(Oncidium) with which it is associated. They will all be here- 
after incorporated with Messrs. Hooker and Arnott's valuable 
Catalogue of South American plants; but as some time must 
elapse before the Monocotyledones can be therein inserted, 
the characters and memoranda have been prepared, with 
a view of encouraging others who may visit such loca- 
lities, to perseverance in the collection of this interesting 
tribe. 
. By a strange inadvertence the pollen-masses are stated to be incumbent 
(8 S) instead of collateral (00 00). They are rightly described in the 
.— * Analytical Table.” amie. 
