PACHYSTOMA. | ORCHIDACEM. 191 



broad, its upper half winged. Pollinia clavate, attached in pair* 

 to two small membranes. Capsule about in. long, ellipsoid. 



Dehra Dun (Mackinnon, Gamble, Duthie). Flowers June-Aug, 

 DISTRIB. : Outer ranges of the Garhwal and Kumaon Himalaya 

 up to 4,000 ft., and eastwards to Nepal, Sikkim and Bhutan ; also 

 on the Khasia Hills, in Chota Nagpur, Chittagong, Konkan and 

 Kanara, and south to S. India and Ceylon ; extending to the Anda- 

 man Islands, Burma, Malay Pen., China, Pacific Inlands and Aus- 

 tralia. 



2. P. articulata, Lindl. in Wall. Cat. 1992, VAR. Griffithii, K.& P. 

 in Ann. R. Bot. Card. Calc. viii, 147, t. 204 ; Duthie id. ix, pt. 2 f 

 116. P. Griffithii, Hook. /. Ic. PL t. 1881 ; F. B. I. v, 845. 



Internodes of pointed stems terete, slightly furrowed, 3-5 in. long, the 

 nodes bearing a few short broad scarious sheaths. Leaves 2, narrowly 

 oblong-lanceolate, 3-4 in. long, tapering at each end. Racemes 

 1-2 in. long, decurved ; peduncles from the top of the pseudobulbs ; 

 rhachis flexuose ; floral bracts J in. long, oblong, obtuse, pale-brown. 

 Flowers white tinged with brown and pink. Sepals J in. long, the 

 dorsal one broadly ovate or suborbicular ; lateral ovate-lanceolate, 

 5-nerved. Petals elliptic-lanceolate. Lip cymbiform, with a didy- 

 mous terminal lobe; side-lobes none; base with 5 lamellate nerves. 

 Column suborbicular; rostellum ovate-acuminate. Pollinia sub- 

 globose. 



Dehra Dun, on sal trees (Mackinnon Gamble). DISTRIB. : Outer 

 ranges of Garhwal Himalaya up to 4,000 ft. and eastwards to Sikkim 

 and the Khasia Hills. This plant is similar in most respects to the 

 type, but smaller in all its parts, and the leaves are much narrower. 



7. PACHYSTOMA, Plume ; FJ. Brit. Ind. v, 811. 



Terrestrial herbs with rather thick rhizomes. Leaves solitary 

 or in pairs, usually appearing after the flowers, long, narrow, 

 many-nerved. Flowers rather small, pendulous, white or pale- 

 purple, puberulous, in racemes or on long pale scapes with clasping 

 striate sheaths ; bracts often large and scarious. Sepals unequal, 

 the dorsal one blunt, lateral subacute. Petals narrow, spathulate. 

 Lip sessile on the footless column, erect ; side-lobes oblong, acute ; 

 terminal small ; disk with 3-5 deeply crested and fimbriate ridges. 

 Column slender, clavate above. Anther dorsal ; pollinia 8, pyri- 

 form, waxy, adhering to a single membrane. Species 6-8, in 

 India, Malaya and Africa. 



