POLYPODIUM. 



133 



toothed along the edge. They are of a leathery texture, and the abundant 

 sori (spore masses) are roundish or oblong. — Hooker, Species Filieum, 

 v., p. 15. 



P. (Goniopteris) Eatoni— Go-ni-op'-ter-is ; Eat'-on-i (Eaton's), Baker. 



A greenhouse species, of small dimensions, native of South Mexico. It is 

 provided with a firm, creeping rhizome, as thick as a quill and densely scaly, 

 from which the narrowly-triangular fronds are produced. These are about 

 lft. long, Gin. broad, and cut down to a broad wing into spear-shaped, simple 

 leaflets nearly lin. broad, of a soft, papery texture, and naked on both surfaces. 

 The sori (spore masses) are disposed in one row near the midvein. — Hooker, 

 Synopsis Filieum, p. 511. 



P. (Phymatodes) ebenipes — Phy-mat-o'-des ; eb-en'-ip-es (black-footed), 

 Hooker. 



This greenhouse species, native of Northern India, where, according to 

 Beddome, it is found at 8000ft. elevation in Sikkim and the North- Western 

 Himalayas, and at 10,000ft. elevation in Nepaul, resembles P. trifidum, but 

 its leaflets reach down deeper, and the main veins are closer and more 

 distinct. — Hooker, Species Filieum, v., p. 88. Beddome, Ferns of British 

 India, t. 138. 



P. effusum — ef-fu'-sum (spreading). A synonym of Nephrodium effusum. 



P. elasticum — el-as'-tic-um (elastic), Richards. 



This stove species, better known in gardens under the names of P. plumula 

 and P. Schkuhri, is a very distinct, stove species, whose habitat extends from 

 Mexico to Peru and Brazil. Its fronds, borne on black, slender, naked stalks 

 lin. to Sin. long, are produced from a short-creeping or sub-erect, stout, woody 

 rhizome. They are spear-shaped, lft. to l^ft. long, 2in. to 4in. broad, and 

 cut down to the rachis (stalk of the leafy portion) into numerous strap- 

 shaped, blunt, entire leaflets of a very elastic nature, the lower ones being 

 gradually reduced. The fronds are naked on both surfaces, and the minute, 

 superficial sori (spore masses) are disposed in one row on each side of the 

 midvein. — Hooker, Species Filieum, iv., p. 200. Nicholson, Dictionary of 

 Gardening, hi., p. 189. 



