49 
60. Tux Gexvs ODONTOGLOSSUM. 
In pursuance of the plan adopted in this work on several 
previous occasions, we now proceed to give an account of the 
species of another of those large genera of Orchids, which 
fill our collections with their species, and whose names are to 
be found scattered through so many books that even the most 
skilful Botanist scarcely knows where to search for them, or 
when his inquiry is exhausted. 
The genus Odontoglossum presents itself. under three 
principal general forms. In the one the anther-bed is sur- 
rounded by a deep fringe, or membranous border ; the two 
others are without that fringe. The first constitutes the sub- 
genus (?) Trymenium ; the second and third are Odonto- 
glossum proper. Of the second the lip is always white, and 
generally broad and flat. Of the third the lip is generally 
yellow, never white, and most commonly narrow. There is 
no tendency at present observed on the part of Trymenium to 
pass into Odontoglossum, and it might be regarded as a genus; 
the two sections of Odontoglossum evidently touch by O. con- 
strictum: and hastatum among the “white lips," and O. lave, 
or such species, among the ‘stained lips." 
Sect. I. TRYMENIUM, Lindl. in Bot. Reg. 1843. t. 3. 
1. O. brevifolium (Lindl. in Benth: Plant. Hartweg. p. 152) ; 
foliis ovato-oblongis oblongisque patentibus seapo sim- 
plici apice multifloro racemoso duplo brevioribus, brac- 
teis oblongis membranaceis pedicellorum longitudine, 
sepalis subrotundis unguiculatis undulatis, petalis paullo 
ininoribus, labello unguieulato basi columnæ adnato auri- 
culato cuneato emarginato sepalis breviore basi tuber- 
culis verrucosis 5 et appendice parva antica 3-dentata 
aucto, clinandrio cucullato: serrato in marginem mem- 
branaceum alæformem decurrens.—— Loxa,—— Pseudo- 
bulbs ovate oblong compressed; one-leaved. ^ Leaves two 
inches broad, and sometimes not much longer. “Flowers 
an inch and a half or more in diameter; eleven or twelve 
. ^in a drooping raceme, apparently purple. ^. > 
2. O. eitrosmum (Lindl: Bot. Reg. 1842. misc. 68 ; 1843. t. 3); 
yseudobulbis subrotundis compressis laevibus monophyllis, 
folio oblongo-ligulato obtuso racemo pauló breviore, se- 
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