127 



POLYSTICHUM. 



POLYSTICHUM SlKKIMENSE. (Bed*) Caudex 1 Stipes and rachises rather copiously furnished with persistent 

 scales, fronds ovate acuminate, subcoriaceo-membranaceous, tripinnate primary pinn* 4-6 inches long, oblong acuminate, pinnules oblong, 

 deeply pinnatifid, } an inch to 1 inch long, secondary pinnules variously pinnatifid with the segments acuminate and falcate, costa of the 

 pinnules waved, veins simple or forked, terminating within the margin, sori generally one to each segment, involucre sub-orbicular peltate 

 stalked, with the stalk below the centre. 



The specimen figured is from Sikkim— (Dr. Thomson.) 



Hab. Sikkim, Himalaya. . 



I forwarded specimens of this fern lately to Sir W. Hooker, who pronounced it to be an undescribed species, and informed me that 

 he intended publishing it in his synopsis, under the name of Nephrodium (L). Thomsoni— the involucres, however, in specimens which I re- 

 ceived from Dr. Thomson, and in others lately collected by Dr. Anderson are always those of Polystkhxm, and not Lastrta, and there is 

 already a Polystkhum Thomsoni 



PLATE No. CXXYII. 



