34 
ODONTOGLOSSUM membranaceum. 
Membrane-sheathed Toothtongue. 
GYNANDRIA MONANDRIA. 
Nat, ord. ORcHIDACE=. $ Vanper—Brassınz. (OrcHIDS, Vege- 
table Kingdom, p. 173.) . 
ODONTOGLOSSUM.— Kunth. 
O. membranaceum ; pseudobulbis foliisque O. Cervantesii, scapo 2-4-floro, 
bracteis vaginisque membranaceis acutissimis equitantibus, sepalis mem- 
branaceis unguiculatis lanceolatis, petalis latioribus oblongis obtusis, 
labello cordato obtusissimo unguiculato, ungue carnoso cyathiformi 
pubescente antice bidentato medio tuberculato, processubus 2 ante 
cyathum elongatis pubescentibus, columns pubescentis auriculis rotun- 
datis.—Sertum Orchidaceum, sub t. 25. Bot. Reg. 1845. misc. 60. 10. 
This delicious species—for so it deserves to be called, on 
account of its agreeable odour and delicate flowers— this deli- 
cious species is quite like O. Cervantesii, figured in this work 
at t. 36 of the volume for last year, in general appearance, 
and may possibly be a mere variety of it. It differs, however, 
in the following respects : 
Its flowers are whiter and rather larger, and the lip is 
spotted at the base; 
Its petals are much blunter ; 
Its lip is very deeply heart-shaped, and quite rounded at 
the point ; 
The two front teeth of the lip are shorter, and less 
hairy; and 
The concavity at the base of the lip has a much smaller 
central tubercle. 
In other respects the two plants may be regarded as being 
identical. They are both Mexican, and may be regarded as 
among the finest species of that country. 
