Tas. 6591, 
DENDROBIUM. Treacuertanum. 
Native of Borneo. 
Nat. Ord. Orcuipex.—Tribe DEnDROBIER. 
Genus Denprosium, Swartz ; (Lindl. Gen. et Sp. Orchid. p.74.) 
Denpropium Treacherianum; rhizomate repente, pseudobulbis ovoideis curvis 
obtuse 5-6-gonis faciebus concavis pallide viridibus rubro-tinctis, foliis 2-nis 
oblongis v. lineari-oblongis obtusis v. apice emarginatis coriaceis luride 
viridibus, scapo gracili paucifloro, vaginis membranaceis elongatis, floribus 
erectis sesquipollicaribus, bracteis angustis membranaceis ovarium gracile 
vaginantibus et zquantibus, sepalis porrectis lineari-lanceolatis acuminatis 
- pallide roseis lateralibus basi dilatatis in gibbum subhemisphericum purpureo- 
/Striatum connatis, petalis sepalo dorsali consimilibus et zquantibus, labello 
~ petalis breviore 3-lobo, lobis lateralibus angustis antice truncatis angulo obtuso, 
intermedio elongato lineari-oblongo acuminato membranaceo, disco 5-7-carinato 
carinis subcristatis, mento obtuso, columna elongata apice 3-fida. 
D. Treacherianum, Reichb. f. MSS. 
This remarkable form of Dendrobe belongs to the section 
with creeping rhizomes and two-leaved pseudobulbs, which 
imitate the Bolbophylla, and frequent the same forests in 
the Malayan Peninsula and Islands. Its nearest ally is 
the Bornean D. celogynoides, Rchb.f. It is a native of 
Borneo, and was imported from thence by Messrs. Low, 
of Clapton, and named in compliment to W. H. Treacher, 
Esq., Colonial Secretary, Labuan. The specimen here 
figured was communicated by Messrs. Low in July last. 
Descr. Rhizome stout, creeping. Pseudobulbs numerous, 
crowded, two to three inches long, ovoid, curved, five- or 
six-angled, the angles prominent and rounded, the faces 
very unequal, concave and smooth, dull brownish green, 
with blood-red stains chiefly towards the tips and down 
the angles. Leaves in pairs, three to four inches long by 
one-half to three-quarters of an inch’ broad, linear-oblong, 
coriaceous, stiff, tip rounded or notched, keeled at the back, 
striate, dull dark green; sheaths at the base subcylindric. 
NOVEMBER Ist, 1881. 
