120 
DENDROBIUM Harrisoni^. 
Mrs HarrisorCs Dendrobium. 
GYNANDRIA MONANDRIA.— Nat. Ord. ORCHIDEM. 
Gen. Char. — Lahellum ecalcaratum, articulatum cum apice processus ungui- 
formis, cujus lateribus petala antica adnata, calcar aeraulantia. Masses 
pollinis 4, parallelae. — Br. 
Dendrobium Harrisonice ; bulbo ovato unifolio, folio ovato-Ianceolato 
undulato basi attenuato, scapo unifioro, petalis duobus inferioribus 
dorso unitis, apice bidentatis. 
Parasitical : Bulb ovate, about as large as a pigeon's egg ; faintly striated 
and partly covered by a reticulated membrane, and bearing at the extre- 
mity a single broadly lanceolate, waved, recurved, striated leaf, about 6 
or 8 inches in length, tapering at the base. 
From the base of this bulb arises a single scape, 4 or 5 inches in length, 
cylindrical, jointed, and at each joint bearing a sheathing membranous 
brownish scale or bractea ; at the extremity having a single, large, up- 
right flower, and the rudiment of a second. The three outer segments 
of the corolla are spreading, the upper one oblong, the two lower ones 
united for their whole length at the back, and tapering down into a sharp- 
ish point, which embraces the lower part of the corolla with its involute 
margins, and is bifid at the extremity. The colour of the three outer pe- 
tals is yellow-brown, tinged more deeply at the extremity, the two 
inner petals are rather smaller than the outer, yellowish ; all of them ra- 
ther thick and fleshy. The Zzp is large, standing erect, and parallel with 
the column, narrow at the base, and yellowish, broad upwards, cut into 
three large lobes, beautifully marked with red veins and pubescence ; of 
these, the two lateral lobes are incurved, the extreme one much undulated 
and recurved. Within, the lip is wholly striated with red lines, except in 
the middle, where is a large, yellowish gland. Column long, adnate for 
nearly its whole length, and uniting together the base of all the petals. 
Anther operculiform, 2-celled. Polleti-masses in two pairs, united toge- 
ther at the base ; each of them is piano-hemispherical, and yellow. Ger- 
men clavato-cylindrical, very long, green. 
VOL. II. 
