Dctidrobium.} OrchidecB. 1 49 



right angles, with two thickened prominences at each flexure ; 

 column short, broad, erect, broadly winged; fr. \ in., ellipsoid, 

 smooth, ribs slender, pedicel as long. 



On trees ; montane zone 4-7000 ft. ; rather common. Hantane ; 

 Hakgala ; below Horton Plains abundant. Fl. July, Sept., Oct.; dull 

 yellow or orange, simulatmg a fly or bug, the pet. being the antennas. 



Burma, Malay Is., Mauritius, Bourbon; not in Peninsular India. 



There is a specimen from Moon, dated 1819, in Mus. Brit. (n. 467), 

 but it is not included in Moon's Cat. as quoted in Fl. B. Ind. 



L. tristis^ Loddiges, cultivated by Loddiges, and said to be from 

 Crylon in his Cat., p. 4, is a name only. 



4. I>£NBROBZUIM[, Swartz. 



Epiphytes; stem pseudobulbous or elongate and slender; 

 1. never plaited; fl. solitary or racemose; sep. subequal, lateral 

 obliquely adnate to the foot of the column, and forming with 

 it a sac or mentum; pet. broader or narrower than the sep.; 

 lip very various, adnate to and incumbent on the foot of the 

 column, concave or saccate, rarely flat or convex, side lobes 

 embracing the column, disk usually ridged or lamellate; 

 column very short, foot long or short, top truncate, angled, or 

 2-toothed ; anth. 2-celled, pollinia 4, oblong, waxy, collateral 

 in pairs in each cell, free or pairs slightly adhering by a 

 viscus. — Sp. about 300; 168 in FL B. Ind. 



The Indian species have been classed under twelve sections, only 

 four of which are represented in Ceylon ; which island possesses only two 

 of the fine flowering species so much cultivated in Europe, namely, 

 D. MacarthicE and D. heterocarpu7n. 



Fl. 1-3, pedicelled on the top of a i -leaved 



pseudobulb i. D. Macr^.i. 



Fl. racemose (solitary in D. crumeftaium). 

 Stem a very small 2-3-leaved pseudobulb. 



Mentum long, spur-like . . . . 2. D. panduratum. 

 Mentum short, stout, incurved . . 3. D. DIODON. 

 Stem elongate. 

 Pet. not broader than the sep. 



Fl. solitary at the nodes of the stem 4. D. crumenatum. 

 Fl. racemose. 



Lip linear-oblong . . . . 5. D. nutans. 

 Lip broadly ovate . . . . 6. D. macrostachyum. 

 Pet. broader than the sep. 

 Stem slender. 



Lip tongue-shaped . . . . 7. D. H^MOGLOSSUM 

 Lip subspathulate . . . . 8. D. Macarthi^. 

 Stem stout, subclavate . . . 9. D. heterocarpum 



