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292 THE ORCHID REVIEW. [OcroBER, IgI!. 
two genera, Brachtia, containing three Colombian species, with erect 
racemes, and the habit not unlike Odontoglossum, and Saundersia, a single 
Brazilian species, with a short radical inflorescence, an elongated lip, and 
an inflated spur, which is adnate to the ovary. The latter genus is 
occasionally seen in cultivation. 
The last group consists of nine genera, in which the perianth is variously 
spurred at the base. In Trichocentrum the lip is united to the column, 
and is extended at the base into a more or less elongated or narrowly 
conical spur. The pseudobulbs are small, usually with a single fleshy leaf, 
and the flowers are borne in short, single or few-flowered scapes. It is 
widely diffused in Tropical America, and about 25 species are known, 
several of which are in cultivation. Jansenia is a Brazilian monotype 
having equitant leaves, and the flowers very similar in structure. 
Rodriguezia has an equally wide diffusion, and contains about forty 
species. The lip is shortly spurred or saccate at the base, and the lateral 
sepals often partially united and concave at the base, enclosing the short 
spur. The pseudobulbs are small, bearing one or two leaves, and the 
flowers are borne in short axillary spikes. | Several of the species are well 
known in gardens, though rather difficult to keep for long together. 
Capanemia is an allied Brazilian genus of about four species, having terete 
leaves, and short racemes of white flowers. 
In Scelochilus the spur of the lip is short or more or less dilated, and 
enclosed in the saccate base of the lateral sepals. The pseudobulbs are 
narrow and one-leaved, and the flowers are borne in short axillary scapes. 
About eight species are known, natives of the Andes of Colombia and Peru, 
one or two of which are occasionally seen in gardens. 
Comparettia is a remarkable genus, ranging from Central America to 
Peru, and containing about five species. The lateral sepals are extended 
into a long spur behind, and the lip also bears a pair of slender spur-like 
horns, which are enclosed within the spur of the lateral sepals. The 
pseudobulbs are one-leaved, and the flowers are borne in long pendulous 
racemes. The species are occasionally met with in cultivation. Diadenium 
is an allied genus, containing two Brazilian and Peruvian species, having 
much smaller flowers of pretty similar structure, but borne in an erect 
panicle. Centroglossa is a small Brazilian genus, also having a spurred lip. 
Cryptocentrum is a remarkable Ecuadorean monotype, in which the 
base of the lip is extended into a long slender spur, which is closely 
appressed to the ovary and enclosed with it in the sheathing bract. The 
sepals are united into a tube. The leaves are narrow, and the scapes 
slender, numerous, and single-flowered. It is not known in cultivation. 
R. A. RoLFE. 
(To be continued). 
