Refugium Botanicum.] (June, 1869. 
TAB. 74. 
Tribe VANDER. 
Genus Oncipium, Sw. 
Section Mu.TonrASTRUM. 
O. RetEMEYERIANUM (Rchb. fil. in v. Mohl. and v. Schlechtendal, Bot. 
Zeit. 1856, 513!). Pseudobulbo obsoleto, folio carnoso basi cuneato 
complicato oblongo acuto seu acuminato, pedunculo longe exserto 
racemoso, ramulis abbreviatis distantibus nunc suppositis, bracteis 
lineari-triangulis dein deflexis, perigonio bene carnoso, sepalis 
tepalisque oblongis apiculatis, nunc equalibus, nunc tepalis multo 
majoribus, labello pandurato disco postico quinque papuloso, disco 
antico radiato striato, column alis obtusatis deflexis. 
Most probably a Mexican species. We obtained the first spe- 
cimen in 1856, from Bremen, out of M. Retemeyer’s garden, to 
whom the species was inscribed. It flowered, in 1857, with 
M. Chantin, of Paris, bearing very long inflorescences, with short 
and distant lateral racemes, as they are to be found in EHpiden- 
drum fuscatum. At length it appeared, in August, 1866, in Mr. 
Wilson Saunders’ garden, where we have lately seen the plant in 
good health. 
Pseudobulb nearly obsolete, consisting of two or three parts, 
oblong, and very remarkable for its throwing out aérial roots 
from the surface of the joints, as we have ascertained in M. Rete- 
meyer’s plant. Leaf solitary, cuneate, oblong-acute or acuminate, 
more or less keeled on the inferior side, very thick, covered all 
over with a purplish or purplish violet hue. Peduncle stout, with 
a few distant acute sheaths, purplish with innumerable green 
dots. Raceme with three to fourteen flowers. Bracts acutely 
triangular, finally bending down so as to give the raceme a 
squarrose appearance, one-third to one-half of the stalked ovary. 
The flower is of a fleshy substance, and has reminded us of Cot- 
tonia peduncularis, Rchb. f. 1857 (Thwaites, 1864), probably in 
consequence of the very dark lip. Sepal oblong-apiculate or 
acuminate, like the petals, which are either nearly equal to the 
sepals or much broader and blunt: we have observed them all 
pallid yellow, with pallid chocolate-brown undulated spots round 
the margins or crossing over the whole; they have been observed 
by our artist deep horse-chestnut brown, with a few yellow rays 
