213 
CATASETUM SEMIAPERTUM. 
GYNANDRIA MONANDRIA.—Nar. Orv. ORCHIDEZ. 
Gen. Cuar.—Cor. petalis subequalibus ; labello saccato-concavo. Columna 
bicornis; cornua retrorsa, filiformia arcuato-conniventia. Anthéra oper~ 
culata, columne interne infra apicem insidens. Pollintia duo, postice bi- 
loba v. suleata ; cundicals mietinas; demum elastice dissiliente, glatidula 
= 
Catasetum semiapertum ; spica compacta foliis breviore, petalis paten- 
tibus subsecundis lato-ovatis concavis, labello ore contracto integro, 
lateribus minute denticulatis. 
The nature of the bulbé and leaves of this plant is so similar to those of Ca- 
tridentatum. ee 
their description. 
The scape springs from the base of the bulb, and, including the flowers, i is 
much shorter than the leaves. These flowers are collected into a dense — 
ovato-globose spike ; each of them smaller than in C. tridentatum, flri- 
bundum and Claveringii, and larger than in C. Hookeri of Linptey. The 
petals are of a pale greenish-yellow, concave, directed to one side, point- -- 
ing downwards, so as to leave the lip, which constitutes the upper part 
of the flower, quite exposed. ‘The lip is a pale and delicate green, with. 
in greenish-purple, very thick and fleshy, forming a deep hollow, ovate _ 
and very obtuse pouch; the mouth much contracted, the front part _ 
quite entire and yellow, the sides furnished with minute, teeth-like ci- 
liz. Column and Anther exactly the same as in C. tridentatum and flori- — 
bundum ; but the pollen- Se ee a deeper 
orange colour. ee 
"Different as Tam aid i hi species from all ‘eo : 
