DENDROBIUM triadenium. 
Three-knobbed Dendrobe. 
GYNANDRIA MONANDRIA. 
Nat. ord. ORCHIDACEE. (Oncnips, Vegetable Kingdom, p. 173.) 
DENDROBIUM. —Swartz. 
D. (Onychium) triadenium (Lindl. in Bot. Reg. 1846, sub. t. 64); radicibus 
villosis, caulibus elongatis teretibus ramosis basi fusiformibus, foliis ovato- 
oblongis obtusis, paniculá brevi terminali confertiflorá racemosá, sepalis 
ovatis acutis, petalis labelloque oblongis undulatis rotundatis emarginatis 
hoc glabro utrinque unidentato medio tuberculo tricrenato aucto, mento 
brevi obtuso, columná apice dentatä, stigmate villoso. 
In characterizing this species, a few weeks since, we 
spoke of it as a lovely plant, with the habit of Dendrobium 
crumenatum, but with a very close racemose panicle of flowers, 
transparent, about as large as in D. aduncum, nearly white, 
with a tinge of rose, a violet spot on the end of the petals and 
lip, and a 3-lobed yellow tubercle in the middle of the latter. 
The accompanying figure will shew that the character thus 
given of it was merited, and it will also serve to bring to the 
recollection of many the beautiful specimens of it produced 
in Mr. Rucker's noble collection, as well as a spotless variety, 
hardly inferior, though different, which has been obtained by 
Messrs. Rollissons. 
From what part of the East Indies it has been procured 
is uncertain; but as the focus of the Dendrobes with a 
thickened base to their stems is the Indian Archipelago, it is 
probable that this has been derived from that quarter. 
The three yellow knobs of the lip, the close inflorescence, 
and the deeply lobed, almost quadrangular petals, distinctly 
mark the species. 
Fig. 1. represents the column; 2. the lip, with its triple 
knob or gland. 
January, 1847. B 
