Plate 2155. 



THELASIS liONaiFOIilA, JIuok.f. 

 Nat, Ord. Orchide^. Snbtribe Notylik^. 



T. (Euthelasis) longifolia, Hook. /. Fl Bnt. LnL vi. p. 87; foliis 



pseudobulbo solitariis 6-9-polliraribus a basi ultra mtdinm sensim 

 dilatatis apice rotundatis scapo valido paucivaginato longioribus, 

 spica laxiflora, sepalis lateralibus cxalatis, labello ovato acuminato. 



Hab. Khasia Hills*, alt. 3,000-4,000 feet, J. D. H. and T. Thomson. 



Psiudohulbns depresso-globosus, | poll, diarn., nudus. Folium ^^-1^ 

 poll, latum, fere petiolatura. Scapus unacum spica laxiflora bipolli- 

 cari 6-7 poll, longiis. Bradece minnta?, late ovatiE. Per!ahthium 

 fere ^ poll, latum. Sepala lateralia ovato-oblonga, obtusa. Petala 

 obloTiiro-lanceolata. Labellum 3-nerve. Rostellani elocgatum, acumi- 



natura, integrum. 



Tkelasis is a genus tbe flowers of which, being of a very soft, lax, 

 succulent texture, are very difficult of examination in herbarium 

 specimens. In this respect of texture the flowers resemble those of the 

 very far removed genus Phreafia in Epichndrece. T. longiJoUa is ve>y 

 closely allied to T. khasiana, but is a much larger plant in foliage and 

 flowers, and has a very robust scape. — J- D. H. 



Fig. 1. Flowers. 2. Column. Both enlarged. 



