Tas. 6085. 
ODONTOGLOSSUM Rozztu. 
Native of New Grenada, 7 
Nat. Ord. Orcuipex.—Tribe VanpEzx. 
Genus Oponroaiossum, H. B. & K. ; (Lindl. Fol. Orchid., Odontoglossum). 
Opontoctossum Roezlii ; pseudobulbis parvis anguste ovatis compressis mar- 
ginibus acutis, foliis pedalibus elongato lineari-lanceolatis acuminatis 
carinatiset lineato-nervoris, scapis gracilibus foliis brevioribus 1-2 floris, 
floribus maximis, perianthio plano, sepalis obovato-oblongis acutis niveis, 
petalis sepalis consimilibus niveis fascia magna lata versus basin san- 
guineo-purpurea ornatis, labello maximo late obcordato in sinu apicu- 
lato, ima basi in unguem brevem contracto, ungue utrinque postice in 
spinam rectam, producto, disco 5-carinato spinisque aureo rubroque 
irroratis, columna breviuscula exalata. 
OpontocLossum Roezlii, Reichb. f. in Gard. Chron., 1873, p. 1303, cum Te. 
Aylog., et in Xen, Orchid., vol. ii. p. 191 (cum, tab. 182 ined.) 
This is a very near ally and a rival of the 0. veaillarium 
(Tab. nost. 6037); so near an ally indeed, that Prof. Reichen- 
bach suggests the possibility of its being a hybrid between 
that plant and O. Phalenopsis. Putting aside the different 
colour of the flower, the principal distinctions between this 
and O. vewillarium are the more slender leaves, which are 
nerved beneath, less robust habit, fewer-flowered scapes, the 
obeordate lip and longer column of this; Prof. Reichen- 
bach indicates the flat (not revolute) sepals and the different 
keels at the base of the lip (he, however, finds three keels in 
this, not five, as in our specimen); to these may be added the 
more slender and much longer floral bracts, and shorter scapes. 
It is stated to be a native of New Grenada, where it was dis- 
covered by M. Roezl, whose name it bears ; and was flowered 
by Mr. Bull in October last ; to whom I am indebted for the 
opportunity of figuring it. It is a superb plant, and in 
Tespect of the pearly whiteness of the flower more admired 
by some than even 0. veeillarium. 
Duscr. Pseudobulds one to two inches long, narrowly ovate, 
compressed. Leaves eight to twelve inches long, narrowly 
linear-lanceolate, acuminate, pale clear green above, paler and 
MARCH Ist, 1874. 
