fid. raceme longer than the leaves and secund flowers, 

 wherein is included P. bicarinata. 



P. immersa is a native of New Grenada, where it was 

 discovered by Linden. Its name is derived from the 

 character of the lower part of the scape being firmly 

 wedged into the central furrow towards the base of the 

 leaf and being thus completely concealed. The specimen 

 figured was contributed from the rich orchid collection of 

 the Glasnevin Gardens, and flowered in the Royal Gardens, 

 Kew, in March of last year. 



, Descb. Rootstoch shortly creeping, sending up short 

 single-leaved stems about an inch high, that are clothed 

 with two acute brown sheaths. Leaves three to six inches 

 long, oblanceolate, acute, tapering into a short petiole, 

 deeply grooved down the centre. Scape longer than the 

 leaf, green, very slender, its base tightly gripped for over 

 two inches by the base of the leaf ; sheaths of scape few, 

 short, appressed, acute, brown. Raceme four to six inches 

 long, drooping, many-fld. ; bracts small, tubular, acute, 

 shorter than the pedicels. Flowers pendulous (from the 

 decurved ovary and pedicel) two-thirds of an inch long, 



brown-purple, two-lipped, pubescent within; lips straight, 

 oblong, upper (dorsal sepal) acute, strongly keeled, lower 

 (ot the two lateral sepals) as long, bifid at the tip. Petals 

 one-fourth the length of the sepals, paddle-shaped, as long 

 as the column. Lip recurved, oblong, obtuse, granulate 

 on the surface with two elevated longitudinal smooth 

 ridges. Column with a mucronate tip as lone- as the petals 

 and lip.—/. D. H . 



5 lw-6-^ihJ' 7 l0W ?v 8 - ; 3 ' do :, with sepals removed; 4, column and lip; 

 o, up, o, anther; 7, polhma:— all enlarged. 



