VANDA. ] ORCH1DACE&. 211 



tessallatum, Sw.; Roxb. FL Ind. Hi, 462. C. tessalloides, Roxb. 



1. c. 463. Vern. Rasna, nai. 



Stem climbing, 1-2 ft. long, emitting many thick white fleshy roots.. 

 Leaves bifarious, approximate, 6-8 in. long, narrow, complicate, 

 keeled; apex praemorse. Racemes longer than the leaves; peduncle 

 6-10 in. long. Flowers 1J-2 in. across. Sepals and petals subequal, 

 spreading, clawed, obovate, undulate, yellowish (rarely bluish), 

 tessellated with brown, their claws and outer surfaces white. 

 Lip f in. long, bluish streaked with purple ; side-lobes small, acute, 

 rising from the mouth of the spur, in. long, ovate, acute, erect ; 

 terminal lobe panduriform, with a purple dilated truncate 2-lobed 

 apex, the margins deflexed ; disk convex, with fleshy ridges ; spur 

 conical, obtuse, straight, hairy within. Column very short. Capsule 

 3-3 J in. long, shortly stalked, clavate, sharply ridged. 



Forests of Dehra Dun and in the Sub-Himalayan tracts of Rohilkhand 

 and N. Oudh (R. Thompson, Duthie). Often climbing on the 

 branches of mango trees and Bassia latifolia (mahua). Flowers during 

 the rains. DISTRIB. : Konkan, Gujarat and Kanara in the Bombay 

 Pres. ; also in Bengal, Behar, Chota Nagpur and Central Provs., 

 extending south to Travancore and Ceylon. The roots are used 

 medicinally in the Chanda district of C. Provinces for rheumatism 

 and fever, and for allaying the pain caused by the stings 'of scorpions.. 



3. V. crlstata, Lindl. in Wall. Cat. 7328 ; F. B. I. vi, 53 ; K. 

 & P. Ann. R. Bol. Gard. Calc. viii, 216, t. 287 ; Duthie id. ix, part 

 2, 146. 



Stem 3-6 in. long, clothed with the remains of old leaf -sheaths. Leaves 

 bifarious, crowded, 3-4 in. long, conduplicate, unequally bilobed 

 at the truncate apex, dilated at the sheathed base. Raceme not 

 exceeding the leaves, axillary, 2-5-fld. Flowers 1^-2 in. across. 

 Sepals and petals incurved, pale olive -green or yellowish. Sepals 

 unequal, oblong, obtuse. Petals narrower than sepals, oblong. Lip 

 adnate to base of column, longer than sepals, green blotched with 

 dull purplish-brown ; basal lobes erect, triangular ; terminal lobe 

 yellow streaked with purple, oblong, with two divaricate oblong 

 lobules and a horn-like, deflexed fleshy beak ; upper-surface with 

 five carunculate ridges. Spur short, conical, obtuse. Column short,, 

 without a foot. Pollinia ovoid, attached by a short broad caudicle 

 to a large quadrate gland. Capsule narrowly clavate, 2-2 1- in. long . 



Dehra Dun (Mackinnon). Flowers during May. DISTRIB. : Outer 

 ranges of Himalaya in Garhwal and Kumaon, up to 4,000 ft.; extend- 

 ing eastwards to Sikkim, Bhutan and Sylhet. 



