208 THE ORCHID REVIEW. [JULY, 1910. 
First-class Certificate from the R.H.S. in August, 1876. It was figured in 
the Floral Magazine (1876, t. 229), and afterwards described by Reichenbach 
(Gard. Chron., 1878, ii. p. 748). It was also drawn by Mr. Day in 
September, 1877 (Orch. Draw., xxii. t. 59), from a plant purchased from 
Mr. B. S. Williams out of Goldie’s importations. Three months later, 
when figuring the typical form (/.-c. xxiii. t. 7), Mr. Day remarked: “I am 
inclined to think that the variety superbum is a distinct species. 
Independently of the great contrast in size, the labellum of that is much 
larger, the middle lobe particularly, and it has not the white callosity covered 
with white hairs which is so conspicuous in the old variety.” The probability 
is that it is a natural hybrid. Specimens from Messrs. Sander are localised 
as islands off New Guinea. 
It is now clear that there are three distinct species, D. bigibbum, D. 
superbiens, and D. Phalznopsis, which are natives of the islands of Torres 
Straits and the adjacent coasts of Queensland and New Guinea, where they 
grow more or less intermixed, while D. Phalenopsis also occurs in a some- 
what outlying station in the islandof Timor Laut. There are also three 
rare, more or less intermediate forms’, now regarded as natural hybrids 
between the others, under the names of D. X Goldiei, D. X Leeanum, and 
D. X Statterianum. A fourth natural hybrid, D. x Fitzgeraldi, between 
D. superbiens and the very distinct D. undulatum, is still only known from 
the original plant. It would be interesting if someone would make the 
crosses indicated, with a view to clearing the matter up. 
R. A. RoLFe. 
LACAENA BICOLOR ALBA. 
AT the Meeting of the R.H.S., held on June 2tst, an inflorescence of an 
Orchid called Lueddemannia Sanderiana alba was exhibited by Mr. F. W. 
Moore, M.A., Keeper of the Royal Botanic Garden, Glasnevin. It is a 
form of Laczena bicolor, Lindl., without the usual purple markings on the 
lip, the flowers being of a nearly uniform yellowish white. LLueddemannia 
Sanderiana was described in 1897 (Kranzlin in Gard. Chron., 1897, il. p. 138) 
from specimens introduced by Messrs. Sander, it is said from the neighbour- 
hood of Medellin, but its identity with Laczna bicolor was soon afterwards 
pointed out (O. R., vi. p. 199). The present one is presumably of the same 
origin, and has all the characters of the original except the purple markings. 
The flowers are numerous and are borne in a. pendulous spike, the colour 
being yellowish white, and the disc of the three-lobed lip hairy. It isa 
striking thing, and like its allies, the Acinetas, and other genera of similar 
habit, should be grown in hanging baskets in the Cattleya house in the 
usual compost. 
Rk. A.B. 
