me to regard the form here figured as the typical state of 

 the plant, possibly improved a little by cultivation, and 

 Lindley's figure as representing a very emaciated or 

 indifferently cultivated state of it. An examination of the 

 native specimen (though ill-preserved and mutilated) seems 

 to prove this ; its leaves are intermediate in breadth 

 between Lindley's and that here figured, and have many 

 nerves ; and the raceme bears thirteen bracts, indicative 

 of the position of as many flowers, of which all but two 

 have fallen away. 



D. sulcatum belongs to the section of the genus which, 

 as limited by Lindley, in his notes on the Orchidology 

 of India (Journal of the Linnsean Society, vol. iii. p. 5), 

 " must be confined to species with stems or pseudo-bulbs 

 bearing leaves at the apex only, and always of a thick 

 leathery texture." Under D. cfirysotoxum in the Register 

 (1847, t. 36), he calls these Club Dendrobes, and considers 

 them best characterized by their fleshy angular stem with 

 two or more manifest articulations, one or more leaves at 

 the upper end, and a lip not broken up into a tuft of hairs 

 or fringes (the latter forming his section Desmotrich/um). 

 Amongst the typical yellow-flowered Dendrocorynes figured 

 in this work are D. chrysotoxwn, Lindl., t. 5053, D. densi- 

 flor urn, Wall., t. S418,D. Farmer i, Paxt.,t. 4659, and the sub- 

 ject of the present plate. The white-flowered D.speciosvm, 

 Sm., t. 3074, and its allies, together with D. tetragonum, 

 Cunn., t. 5956, all from Australia, are rather aberrant 

 members of the same section. The type may be regarded 

 as D. aggregatum, Roxburgh, which is the first described 

 of the Indian yellow-flowered Dendrobes. 



Our specimen was received in 1886 from the Botanical 

 Gardens of Calcutta, and was said to have come from 

 Assam. It flowered in April, 1887, in the cool orchid- 

 house, which favours the supposition that it is a native of 

 the Khasia Mountains, rather than of Assam. — J. D. II. 



Fig. 1, Lip; 2, base of flower and column; 3, anther; I. pollen-masses: — all 

 < irfarged. 



