Tas. 5956. 
DEN DROBIUM rerraconum. 
Native of Moreton Bay. 
Nat. Ord. Orcuipace #,—Tribe, MaLaxipeEx.—Section, Denprosiem. 
Genus, Denprosium, Swartz; (Lindl. Gen. and Sp. Orchid., p. 74). 
DeEnproxium tetragonum; pseudobulbis fasciculatis anguste elongato-clavatis 
in stipitem gracilem basi tuberosum attenuatis acute 4-gonis articulatis, 
foliis binis patentibus elliptico-lanceolatis acuminatis coriaceis undulatis, 
racemis brevibus terminalibus 1-paucifloris sepalis elongatis anguste 
lanceolato-subulatis, lateralibus pendulis tortis, petalis sepalis breviori- 
bus et angustioribus, labello sepalis multo breviore ovato, lobis latera- 
libus rotundatis, intermedio late ovato mucronato revoluto. 
Denvrosium tetragonum, F. Muell. Fragm. Phytog., vol. i. p. 87. 
A very distinct species of Dendrobe, a native of the 
wooded islets in Moreton Bay, for which the Royal Gardens 
are indebted to Messrs. Rollisson and Sons, of Tooting. It 
‘is remarkable for the very long pendulous stems or pseudo- 
bulbs, which hang in masses from the tree trunks, and are 
terminated by a pair of waved leaves. The flowers are by no 
means handsome, and its singular habit alone recommends 
it for cultivation. The specimen here figured flowered in 
the Royal Gardens in November of last year. 
Drscr: Stems or pseudobulbs pendulous, densely fascicled, 
five to sixteen inches long, acutely tetragonal, very narrowly 
clavate, narrowed downwards into a very slender rigid terete 
stalk, which suddenly dilates into a globose woody tuberous 
ase that emits roots from its under surface, that attach it to 
ark of the trees it grows on; tubers one-third inch 
diameter, transversely scarred, persistent. Pseudobulbs 
jointed on to the tuber, and at distant intervals throughout 
MARCH Ist, 1872, 
