126 



POLYSTIOHUM. (See " Ferns of Southern India/' p. 41.) 



POLYSTTCHUM ThOMSONI. (Hook.) Caudex short thick scaly, stipites tufted 1-3-4 inches long paleaceous with large 

 scales, fronds 6-8 inches long, lanceolate acuminate chartaceo-membranaceous pinnate, pinnae sub-sessile, 1 to 4 inches long, deltoid-ovate or 

 semi-ovate acute subauricled and deeply pinnatiQd (especially at the superior margin), lobes small, ovate inciso-serrate, teeth setoso-spinu- 

 lose, sori solitary on each lobe, involucre subovate membranaceous peltate pedicellate, the margin suberose. Hook Sp. Fil. iv. 7. 

 Hook. 2nd Cent of Ferns, t. 25. 



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



Hab. Sikkim, Himalaya, Kumaon, elev. 9 to 13,000 feet, Simla. 



PLATE No. CXXVI. 



