ORCHIDE. Æ.. 
Tribe III. VANDEÆ. 
OncHIDEZ, Tribus VANDER. Lindl. Orch. Sceletos. 
Pollen in massas cereaceas (pollinia) definitas cohzrens, sub anthesi la- 
mellz elasticz (caudicule) et glandule stigmatis agglutinatas. Anthera 
terminalis, rard dorsalis, opercularis. Herb: epiphyte v. terrestres, 
nunc (presertim in Americanis) pseudobulbis oligophyllis gaudentes, 
nunc (presertim in Asiaticis) caulescentes; fer? omnes intra tropicos 
provenientes. 
The presence of the elastic or transparent strap called caudicula, which 
separates along with the gland of the stigma about the period of impreg- 
nation, and forms a strict adhesion with the pollen masses, forms the dis- 
tinctive character of this tribe. In Epidendree the caudicula is present, 
but in neither those nor in Malaxidez, the only tribes with which Vandez 
can be easily confounded, is there any separation of the gland from the 
stigma. In some genera of Vandeæ such as Cymbidium, there is no dis- 
tinction between the caudicula and the gland; but the spontaneous sepa- 
ration of the latter sufficiently indicates the real affinity of such genera. 
Through Calanthe we have a direct passage from Vandez to Ophrydez. 
_ It is probable that this very extensive tribe is susceptible of subdivision 
into several tolerably well defined groups, of which Maxillaria, Cymbidium, 
Eulophia, Masdevallia, Oncidium, Aerides, and Calanthe might be taken 
as the types. But it would be premature to attempt such a subdivision in 
the absence of more precise knowledge of the structure of a great number 
of species. I therefore propose, in the mean while, the following artificial 
table, as a ready means of analysing such genera as I am at present ac- 
quainted with. 
ARTIFICIAL ANALYSIS OF THE GENERA. 
A. Pollinia 2, integra, v. sulcata, v. alte biloba; v. 4. 
1. § Caudicule 2. 
Sepala lateralia basi in calcar spurium connata. - 
Sepala libera, basi non producta, 
spatulata unguic. Petala lobata. Labellum 4 partitum. 
sessilia. 
Labellum cum ung. product. columnz artic. 
Unguis columne calcarat. - 
Unguis columns mutica. E 
Dec. 1832. T 
- 154. PopocuiLus. 
160. CRvPTOPUS. 
- - 159. AERANTHES. 
B 82. BIFRENARIA. 
