SCOL OPENDRIUM. 



317 



6in. long, are in the form of an arrow, distinctly heart-shaped at the base, 

 with sometimes short and rounded, at other times prominent and almost 

 sharp, lobes. Their texture is also thinner than that of S. vulgare, their veins 

 are more branched, and their spore masses are much shorter. This species 

 thrives best in a warm, sheltered situation in a shaded rockery. — Hooker, 

 Species Filicum, iv., p. 2. Nicholson, Dictionary of Gardening, iii., p. 393. 

 Correvon, Les Fougeres rustiques, p. 123. 



S. Krebsii— Krebs'-i-i (Krebs'), Kunze. 



This singular and very interesting, greenhouse species, by some authors 

 placed in the genus Lomaria, of which it possesses only the outward 

 appearance, is a native of Natal and the Cape of Good Hope. Its distinctly- 

 pinnate fronds, 1ft. to lift, long and borne on short stalks, are produced from 

 a half-erect rootstock. They are broadly spear-shaped, with an abruptly- 

 pointed extremity and numerous smooth, spreading leaflets of a leathery 

 texture ; these are about Sin. long, stalkless, spear-shaped, and heart-shaped 

 above and below at the base. Every leaflet has a large number of parallel 

 rows of sori directed from the midrib towards the edge at a sharp angle 

 with the former.— Loive, Ferns British and Exotic, v., t. 56. Botanical 

 Magazine, t. 4768. 



S. (Schaffneria) nigripes — Schaff-ner'-i-a ; nig'-rip-es (black-footed), 

 Hooker. 



A stove species, native of Mexico and Guatemala, with ovate or roundish 

 fronds lin. to ljin. broad, of a thick, leathery texture, borne on black, polished 

 stalks lin. to 2in. long and jointed at the summit. The spore masses are 

 disposed in irregular, linear or oblong patches.— Hooker, Synopsis Filicum, 

 p. 247. 



S. Officinarum — of-fic-i-na'-rum (officinal). This and S. officinale are 

 synonymous with S. vulgare. 



S. pinnatum— pin-na'-tum (once-divided), J. Smith. 



The fronds of this stove species, native of the Philippine Islands, are 

 borne on compressed, greyish stalks, and are 2ft. to 4ft. long. They are 

 composed of an entire, terminal leaflet 4in. to 6in. long, ljin. to 2in. broad, 



