PL. CCCLX Ia 
COLAX JUGOSUS uot. 
THE RIDGED COLAX. 
COLAX. Perianthium vix ringens, in mentum breve productum, subglobosum. Sepala et petala subaequalia 
oblonga. Labellum unguiculatum, immobile, inappendiculatum, ungue brevi sublineari in laminam dilatatam ee 
dilatato. Columna semiteres, subelongata. Anthera carnosa, subimmersa. Pollinia 4, obovoidea, 
naceae elongatae angustatae adnata; glandula obscura. Rostellum quinquelobum. 
Herbae pseudobulbosae Brasilienses. Folia terminalia et radicalia plicata. Pedunculi radicales, erecti, 1-4 flori, 
vaginati. Flores majusculi. 
caudiculae membra- 
Species descriptae 5, Brasilienses. 
Colax LinpL. Bot. Reg., XXIX (1843), Misc., p. 50. 
Colax jugosus. Pseudobulbi ovoideo-oblongi. Folia elliptico-lanceolata, acuminata, plicata, basi subattenuata. 
Pedunculus 2-4 florus, Bracteae lanceolato-ovatae, acutae, cucullatae. Sepala rotundato-ovata, obtusa, alba, Petala 
rotundato-obovata, obtusa, alba fasciatis purpureis creberrime notata. Labellum trilobum, villosum, jugosum, album, 
purpureo-fasciatum, lobis lateralibus parvis, intermedio suborbiculari. Columna villosa. 
Colax jugosus LINDL. Bot, Reg., XXIX (1843), Misc., p. 51. — Reus. F. Xen. Orch., 1, p. 107, t. 41. — 
Bot. Mag., t. 5661. — Ill. Hort., XIX, p. 128, t. 96. — Orchidophile, 1881, pp. 35, 36, cum. xyl. 
Maxillaria jugosa LinDL. Bot, Reg., XXVII (1841), Mise., p. 51. 
Var. punctatus Reus. F. in Gard. Chron., 1883, pt. II, p. 688. 
Var. rufinus Reus. F. in Gard. Chron., 1883, pt. II, p. 784. 
he genus Colax was established by Linptey on three Brazilian plants 
formerly referred to Maxillaria, but which the author spoke of as more 
2 nearly resembling Promenaea and Warrea in the shape of the perianth. 
“ They have a caudicle, ” he remarked, “ quite unlike anything at present 
known among their race. It has no distinct gland, but consists entirely of a 
thin wavy membrane, strengthened by an elevated line in the middle, and 
eradually narrowing to the point, where the gland is usually found. It has also 
a thick fleshy crested anther, whose cells are planted on its lower side, I cannot 
but regard these circumstances as sufficient to justify the separation of the plants 
in which they are found as a distinct genus. ” 
BentHam has since united Colax with Lycaste, to which it is more nearly 
allied, yet the differences originally pointed out serve equally well to separate 
it, and these, taken in conjunction with the quite different habit, seem to me 
sufficient to warrant its retention as a distinct genus. 
The present species was introduced from Brazil by Messrs LoppicEs, of 
Hackney, with whom it flowered in 1841, when it was described by LINDLEY as 
Maxillaria jugosa, evidently in allusion to the ridges on the lip. Two years 
later it was transfered to Colax. It is a very attractive plant, as the prettily 
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