MALAXIDEA. DENDROBIB&. 47 
XXX, MEGACLINIUM. 
Megaclinium. Lindl. in Bot, Reg. 989. 
Sepala erecta, inequalia: lateralibus minoribus cum columna connatis. 
Petala nana, Labellum nanum integerrimum cum basi columne elastic? 
articulatum. Columna nana marginata disciformis in apicem ovarii prona 
basi vix producta. Anthera obsolete bilocularis.  Pollinia 4, libera, 
per paria coherentia, equalia.—Herbe epiphyte, rhizomate repente 
pseudo-bulbifero. Folia coriacea, avenia. Racemi radicales. Rachis 
dilatata, compressa. 
A genus nearly related to Bolbophyllum from which however it is abun- 
dantly distinct. 
1. MEcacriNIUM falcatum. Lindley. 
M. foliis binis ovalibus emarginatis biplicatis, rachi compressà faleatà cre- 
natà, sepalo supremo obtuso apice utrinque calloso: lateralibus reflexis 
bidentatis, petalis minimis subulatis obtusis. 
Megaclinium falcatum. Lindley in Bot. Reg. t. 989. 
Hab. in Sierra Leone (v. v. cult.) 
The lip of this plant is elastically articulated with the column, and ex- 
hibits a beautiful instance of vegetable irritability, analogous to that of 
some species of Pterostylis. The lip moves up and down with great ra- 
pidity, much in the same way as the head of the Chinese images of Man- 
arins. 
2. MEGacLINIUM maximum. 
Hab. in S, Leone; Smeathman (v. s. sp. in Herb, Banks, sine floribus et foliis.) 
Rachis 5 uncias longa, semunciam lata, complanata, crenata. Scapus pe- 
dalis. Rhizoma penne cygnez crassitudine, Pseudo-bulbus oblongus, 
verosimiliter angulatus, 
XXXI. BOLBOPHYLLUM. 
Bulbophyllum. Thouars orch. Afr. Lindley in Bot. Reg. 832. Orch. scel. no. 143.—Bolbo- 
phyllum. Spreng. syst. 3. p. 732.—Diphyes. Blume Bijdr. 310. tabellen 66,—Tribrachia. 
Lindl, in Bot. Reg. 832.—Anisopetalum. Hooker Fl. Exot, 149. 
Sepala erecta, acuminata, subequalia, lateralibus cum pede columne con- 
natis et basi obliquis. Petala nana (rarissimé sepalis subzqualia). La- 
bellum cum pede columne articulatum, unguiculatum, szepiüs integrum, 
et posticum. Columna nana, antic? bidentata, v. bicornis. Anthera 1-v. 
2-locularis. Pollinia 4, libera, valdé inequalia, nunc in uno connata, 
nunc per paria coherentia, altero cujusvis paris minuto lobuliformi.— 
Herbe epiphyte, rhizomate repente pseudo-bulbifero, Folia coriacea, 
avenia. Racemi radicales. 
I have no hesitation in referring all the above cited genera hither. 
When I published Tribrachia I was only acquainted with Bolbophyllum 
through Du Petit Thouars’s figures; I now know them to be the same. 
Diphyes is obviously a synonym. Dr. Hooker's Anisopetalum differs only 
in the greater inequality of the sepals. Even Cirrhopetalum itself is less 
distinct from Bolbophyllum than would appear from the inspection of the 
lst and 2nd species. 
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