152 VANDE. 
LXXXII. BIFRENARIA. 
Sepala patula, libera, subequalia; lateralia cum basi productà columne 
adnata, vix basi obliqua. Petala sepalis dupld minora. Labellum cum 
pede mucronato columne articulatum, cucullatum, trilobum, medio 
callosum. Columna brevis, semiteres, mutica. Anthera mutica, sub- 
cristata. Pollinia 4, per paria incumbentia, caudiculis duabus distinctis 
materiei viscide rostelli adherentibus, glandulA .... Epiphyta, 
pseudobulbosa, Maxillariz (Colacis) habitu. 
Nearly related to Maxillaria, especially to the Colax division ; but dis- 
tinct in its double caudicula, and want of an obvious gland. 
i. Birrenaria atropurpurea. 
Maxillaria atropurpurea. Lodd. Bot. Cab. t. 1877. 
Hab. in Brazilia, prope Rio Janeiro; Warre. (v. v. c. comm. amic. Lod- 
diges.) 
Pseudobulbi ovati, obtusi, tetragoni. Folia oblongo-lanceolata, plicata, 
solitaria. Racemi radicales, 3-flori, pseudobulbis pauld longiores. Flores 
atropurpurei, odoratissimi. Labellum lobis lateralibus brevibus diver- 
gentibus, intermedio transverso sub-3-lobo revoluto suberoso; callus 
in medio antice tridentatus. 
LXXXIII. DICRYPTA. 
Heterotaxis. Lindl. in Bot. Reg. t. 1028, charactere erroneo. Dicrypta. Supra p. 44. 
Sepala libera, erecta, equalia. Petala conformia, pauld minora. Labellum 
oblongum, obsoleté trilobum, carnosum, cum columna articulatum, 
callo elevato interrupto disci. Columna cum ovario continua, semiteres, 
ad basin antice clavata. Clinandrium convexum. Anthera obsolete bi- 
locularis. Pollinia 4, complanata, incumbentia (Q S8): posticis minori- 
bus, caudiculà brevi lineari, glandulA lunatà. Herba epiphyta, 
acaulis. Folia coriacea, ligulata, cum basi nunc bulbosa articulata. 
Flores solitarii, axillares, pedunculis vaginatis. 
1. DicnxrrA Baueri. 
Heterotaxis crassifolia. Zindl. in Bot. Reg. t.1028. Lodd. Bot. Cab. t. 1651. 
Hab. in Jamaica, sec. hortulanos ; an potius in Brazilia? (v. v. c.) 
This plant is a memorable instance of the danger of describing Orchid- 
eous plants from imperfect cultivated specimens. I first met with it m 
1824, in Mr. Lee's Nursery at Hammersmith when I found the pollen masses, 
in the words of my notes at that time made, ** linearia hinc crassiora, e grantis 
plurimis minutis angulatis filo axili coherentibus." I accordingly introduced 
this character into the definition of the genus Heterotaxis, which in fact 
received its name because it was as it were of two different orders, being 
a Vandea in appearance and an Arethusea in structure. ‘Subsequently n 
1830 when I for the first time saw, in Mr. Bauer's Portfolio, an analysis 
of this same plant, its pollen was represented so differently that I did not 
recognise it to be Heterotaxis, but took it for a new genus and called it 
Dicrypta. Mr Bauer had drawn the pollen masses as four, lying in pal's 
one upon the other so that the external masses which are the largest con- 
cealed the internal ones, whence the name. Neither gland nor caudic 
having been found by Mr. Bauer I referred the plant to Malaxidee. MY 
