Os. 
PL. CCCXVII. 
DENDROBIUM BIGIBBUM uov. var. ALBO-MARGINATUM t. uno. 
THE DOUBLE-SPURRED DENDROBIUM, WHITE-MARGINED 
VARIETY. 
DENDROBIUM. Vide Lindenia, Engl. ed., vol. I, p. 37. 
Dendrobium bigibbum. Pseudobulbi elongati, erecti, apice 3-5-phylli. Folia oblongo-lanceolata, subacuminata. 
Racemi suberecti, elongati, multiflori. Flores speciosi, roseo-purpurei. Bracteae minutae. Sepala lanceolato-oblonga, 
acuta. Petala sepalis multo latiora, patentia v. recurva, rhombeo-rotundata, obtusa. Labellum trilobum, lobis late- 
ralibus rotundatis incurvis, lobo medio late oblongo obtuso, callo oblongo papilloso albo, calcare recto obtuso basi 
inferne in sacculum subhemisphericum dilatato. Columna brevis, ima basi bicallosa. 
Dendrobium bigibbum LinDL. in Paxt, Fl. Gard., III (1852-3), p. 25, fig. 245. — Bot. Mag., t. 4898. — WARN. 
Sel. Orch. Pl., ser. 2, t. 8. — Fl. d. Serres, t. 1143. — BaTEM. Sec. Cent. Orch. Pl., t. 169. — WARN. & WILL. 
Orchid Album, I, t. 38. — BENTH. Fl. Austral., VI, p. 277. — Fl. & Pomol., 1873, p. 165, cum. xyl. — Fl. Mag., 
n. s., 1880, t. 386. — Ill. Hort., XXX, p. 25, t. 476. — VeiTcH Man. Orch. Pl., pt. 3, pp. 22, 23, cum. xyl. — 
Orchidophile, 1891, p. 208. 
Var. superbum BurBinGE Fl. Mag., n. s., 1876, t. 229. — Ren. F. in Gard. Chron., 1878, pt. 2, p. 748. 
Var. candidum Vei1tcH Man. Orch., pt. 3, p. 23. 
Var. albo-marginatum, Flores irregulariter albo-marginati. 
Var. albo-marginatum LINDEN in horto. 
Ne endrobium bigibbum was originally described and figured by D* Linptey, 
Wa f} in Paxton’s Flower Garden, in 1852, from a plant which flowered with 
Keuseedée4) Messrs Loppicrs, of Hackney, in January of that year. In 1856 it was 
figured in the Botanical Magazine, from a specimen communicated by that firm 
in November of the previous year. The plant had been received from D' Tomson, 
who found it in Mount Adolphus Island, in Torres Straits, close to Cape York, 
the most northerly point of Queensland. In 1865 a large consignment was sent 
from the same locality by the late M* Joun Gourp Verrcn, and in 1876 Gotpiz, 
then on his way to New Guinea, met with it, and sent a batch of plants to 
M' B. S. Wituras, of Upper Holloway. This was from an island in the Torres 
Straits, but which one is not stated. Probably it grows in several of the islands, 
as we know from dried specimens that it occurs in the adjacent Thursday Island. 
Although not described until 1852, it appears to have been known nearly 
thirty years earlier, for according to Retcnensacu there is a beautiful drawing 
by Francis Bauer preserved at the British Museum, which shows that it flowered 
at Kew as early as the year 1824; so that it must have remained undescribed for 
over a quarter of a century. 
The species is not subject to much variation, though two or three varieties 
have been described. The first of these is the variety superbum, which is described 
as having larger and more brightly coloured flowers than the ordinary form. It 
