78 DIACBIUM. 



the base of the lip, and a third shallower and shorter one between them. 



Column slender, clavate, narrowly winged on each side of the stigmatic 



cavity, pale purple. Anther two-celled ; pollinia eight, four in each cell, 



disk-like, compressed, pale yellow. 



Arundina bambus^folia, Lindl. Gen. et Sp. Orch. p. 125 (1831). Bot. Reg. 

 1841, misc. No. 5. AViglit, Ic. pi. Iiul. or. V. t. 1661. Williams' Orch. Alb. 

 III. t. 139. 



This pretty orchid first became known in the early part of the present 



century through Dr. Eoxburgh, Superintendent of the Botanic Garden 



at Calcutta; it was subsequently noted by Wallich, Griffith and other 



Indian botanists. It is a native of N. E. Bengal, Assam, and north 



Burmah, and was first introduced into British gardens by Messrs. 



Loddiges, in whose nursery it flowered for the first time in 1841. 



Cultural Note. — A compost of fibrous peat and loam, such as is used for 



terrestrial orchids with slender stems, the Sobralias for example, is the 



most suitable. The drainage of the pots should be ample, and water 



freely supplied during the growing season. A light position in the 



East India house should be given to the species described above. 



SUB-TRIBE LyELIE^. 



Inilorescence nearly alwai/s terminal. Pollinia in one or two series of 

 4 each, those of each series h/ing side hij side, ovate, laterally compressed, 

 and connected by a polUnary appendage in the form of two linear laminoi 

 often uniting into one, and ascending from the base of the lower or single 

 series along their outer edge ; the uppf.r series, ivhen present, descending 

 from the upper end of the lamina, and often smaller than the loiver 

 series.* 



DIACRIUM. 



Benth. in Jour. Linn. See. XVIII. p. 312 (1881). Benth, et Hook. Gen, Plant. III. 

 p. 526 (1883). 



The three or four species, or marked varieties of one species, now 



referred to Diaci'ium, were made sectional by Lindley under Epiden- 



drum, but " the peculiar bi-cornute labellum which is neither adnate 



•Bentham in Jour, Linn. Soc. XVIII. p. 311. 



