POLYPODIUM. 155 



P. (Phymatodes) juglandifolium — Phy-mat-o'-des ; ju-gkn-dif-ol'-i-um 

 (Walnut-leaved), Don. 

 This greenhouse species, wMcli is found in Northern India up to 10,000ft. 

 elevation, is very variable as regards the size of its fronds, which are simply 

 pinnate (only once divided to the midrib) and usually IJft. to 2ft. long, 1ft. 

 or more in breadth, and borne on firm, erect stalks Ift. or more in length 

 and of a glossy nature. These fronds are produced from a stout, woody rhizome 

 covered with large, egg-shaped scales of a bright rusty-brown colour, and 

 composed of a terminal leaflet and of several pairs of lateral ones disposed lin. 

 or 2in. apart, the edge of which is thickened and wavy, and the base usually 

 rounded. They are of a somewhat leathery texture, naked on both sides, 

 and the large and abundant spore masses form a row nearer the midrib than 

 the edge. P. capitellatum is identical with this species. — Hooker, Species 

 Filicum, v., p. 90. Nicholson, Dictionary of Gardening, iii., p. 190. 



P. Karwinskianum — Kar-win-ski-a'-num (Karwinski's), A. Braun. 



A stove species, of botanical interest only, with rhizome, fronds, and 

 fructification similar to those of our popular P. vulgare. It is a native of 

 Mexico and Guatemala. — Lowe, Ferns British and Exotic, ii., t. 40. 



P. khasyanum — khas-y-a'-num (native of Khasya), Hooker. 



This is a very distinct, small-growing, stove species, native of Khasya 

 and Assam, where, according to Hooker and Beddome, it occurs at elevations 

 varying between 3000ft. and 4000ft. Its narrow fronds, 1ft. long, but seldom 

 more than l^in. broad, and borne on very short, tufted stalks fringed with 

 short hairs, are of a flaccid nature and cut down within a short distance of 

 the rachis into linear-oblong, either entire or slightly undulated, blunt lobes 

 of a thick and somewhat leathery texture and hairy on both sides. The spore 

 masses are sunk and disposed in rows of from four to six on each side of the 

 midxih.— Hooker, Species Filicum, iv., p. 191 ; Second Century of Ferns, 

 t. 49. Beddome, Ferns of British India, t. 173. 



P. (Goniophlebium) Korthalsii — Go-ni-oph-leb'-i-um ; Kor-thals'-i-i 

 (Korthals'), Mettenius. 

 This stove species, native of Sumatra, somewhat resembles the better- 

 known P. subauriculatum. It is .provided with a wide-creeping rhizome, from 



