65 



DENDROBIUM sulcatum. 



Furrowed Dendrobium. 



GYNANDRIA MONANDRIA. 



Nat. ord. Orchidace^:, § Malaxide^:. 

 DENDROBIUM. Bot. Register, vol. 1 . fol. 548. 



§ IV. Caules undique foliosi versus apicem sensim incrussati unde clavali 



fiunt. 

 D. sulcatum ; caule clavato sulcato subflexuoso comprosso, foliis oblongis acutis 



3-nerviis, pedunculis lateralibus trifloris, bracteis minimis acutis appressis, 



petalis oblongis obtusis glabris sepalis subasqualibus, labello obcordato hir- 



suto ungue canaliculato sulcato. 



A native of India, whence it was obtained by Mr. Gibson 

 for His Grace the Duke of Devonshire. The drawing was 

 made from a specimen which flowered at Chatsworth in 

 April last. 



It is a fine species, nearly related to D. Griffithianum, 

 from which it differs in its three-flowered peduncles, and in 

 the form of the lip, 



Its cultivation differs from that of many species belong- 

 ing to this order. At certain seasons the plants will manifest 

 an inclination for growth ; they must then have plenty of 

 water and be freely syringed over-head. When the growing 

 season is over, the leaves will become yellow, and finally 

 dropoff; water must then be discontinued, the temperature 

 lowered, and the plants allowed a season of rest. After re- 

 maining in this state for a few weeks, the temperature may 

 again be raised, and the plants — which by this treatment 

 will have been rendered exciteable — will come freely into 

 flower. Water need not be given until the plant begins to 

 shoot from below, when it will require the same treatment 

 as before. Of course it is to be cultivated in a stove or 



