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a 
PL. CCCLXXVII. 
MAXILLARIA CALLICHROMA rcup. F. 
-THE PRETTILY-COLOURED MAXILLARIA. 
MAXILLARIA. Sepala subaequalia, inter se libera, lateralia basi pedi columnae adnata, mentum saepius 
parum prominens formantia, patentia v. rarius suberecta. Petala sepalis similia v. interdum minora. Labellum ad 
apicem pedis columnae ungue brevissimo inflexo erectum, concavum ; lobi laterales erecti, medius ovato-oblongus, 
patens, sepalis paullo v, multo brevior; discus subnudus v. tuberculo instructus. Columna erecta, saepe leviter incurva, 
crassa, semiteres, exalata, antice concava; clinandrium crassiusculum, concavum, integrum. Anthera terminalis, oper- 
cularis, incumbens, conica v. semiglobosa, unilocularis v. imperfecte bilocularis, saepe pubescens; pollinia 4, ovata, 
compressa, per paria faciebus planis sibimet incumbentia, inappendiculata, anthera dehiscente stipiti plano brevi nunc 
brevissimo affixa, glandula squamiformi. 
Herbae epiphyticae, caulibus nunc in rhizoma brevissimum, mox in pseudobulbum carnosum uni-bifoliatum 
incrassatis, nunc ad apicem rhizomatis elongatis dense distichophyllis. Folia coriacea, tenuia v. subcarnosa, praeter 
costam tenuiter venosa. Scapi v. pedunculi ad basin pseudobulborum v. in axillis foliorum solitarii, bi-multivaginati, 
semper uniflori. Flores magni v. mediocres. : 
Maxillaria Ruiz et PAVvon Prodr. Fl. Chil. et Peruv., p. 116, fig. 25. — BENTH. et Hook. F. Gen. Plant., 
TI, p. 554. 
Maxillaria callichroma. Pseudobulbi rotundato-ovoidei, parvi. Folia oblonga v. lineari-oblonga, subacuta, basi 
attenuata. Pedunculus dense vaginatus, vaginis subimbricatis amplis. Bractea spathacea, acuta. Sepala lanceolato- 
linearia, acuta, lateralia divaricata, apice falcato-incurva. Petala sepalis similia, paullo breviora et angustiora, infra medium 
reflexa, apice incurva. Labellum trilobum petalis duplo brevius, lobis lateralibus semioblongis, subobtusis, intermedio 
teflexo elliptico-oblongo obtuso undulato, callo carnoso linguiformi inter lacinias laterales locato. Columna clavata. 
Maxillaria callichroma Reus. F. in Bonplandia, II (1854), p. 16. — Reus. F. in Walp. Ann., VI, p. 518. 
his interesting species was originally discovered by WacEner, when 
collecting Orchids in Venezuela, being met with near Caracas at 
6000 feet elevation. It flowered in the collection of Herr Kererstein, 
who about this time was the possessor of one of the finest collections of Orchids 
in Germany, and was described by REICHENBACH, in 1854, being compared with 
Maxillaria leptosepala Linpu., and M. setigera Linvi. In its general appearance 
it bears a considerable resemblance to M. luteo-alba Linpu., especially in the 
colour of the flowers, but it is a smaller plant in every respect. 
For a very long period it was either lost to cultivation or excessively rare, 
but plants have recently been obtained by Messrs Linpen, L’Horticutture INTER- 
NATIONALE, Brussels, which, so far as I can judge, belong to the species col- 
lected by Wacener, though I have not been able to compare them with any 
dried specimen of the original collection. If any specimen exists outside the 
inaccessible Reichenbachian Herbarium, it would be an interesting matter to 
compare the two together, as it is very difficult to identify Maxillarias from 
description only. 
The general character of the present plant is shown in the accompanying 
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