-5M F.I L ICES. 



8 to 10 lines long, 2 to 21 lines broad, oblong-linear, somewhat falccCte 

 and obtuse, the base a little dilated, the margin recurved (in a dry 

 state) toward the point dentate; the veins on both sides conspicuously 

 evident usually forked between the sporangiferous receptacle and 

 mar-in ' and, together with the base of the sinus of that portion of the 

 pinnle that is pinnatifid, translucent when held up between the eye 

 and the light. Rhachis chaffy, with long, narrow, straw-coloured 

 paleoe Sori close to ,the >costa, becoming continent and concealing the 

 latter, and continuing outwards to within a line's breadth of the point. 

 Indusium coriaceous, fuscous, entire. 



This is distinguished from B. Fontanesianum by its broader pinnae, 

 more approximate and broader, obtuse, nervose pinnules, the palea- 

 ceous rhachis, and paler indusium. 



14. Blechnum polystichoides, Sp. Nov. 



B cmpitosum; stantibus Unc sulcatis paleaceis asperis ; frondibus sub- 

 coriaceis glabris bipinnatis; pinnis alternis sessUibus divaricate 

 ■ oblongo-lanceolatis basi pinnatis apke lobatocrenatis ; pmnuhs trmnr 

 gulari-ovatis obtusis margine revolutis<crenatis; rliachi costaque crebre 

 paleaceis; venis immersis furcatis-; indusio cartilagineo lacero. 



Hab. Sandwich Islands: along the margins of streams; rare. 



Stipes tufted, 6 to 8 inches long (in a dry state angular), with a 

 .shallow groove in front, of a reddish.brown colour, asperous, and 

 together with the rhachis and costa densely paleaceous; the paleae 

 broad at the base, linear, attenuate,, and of the same, colour as the 

 stipe. Fronds subcoriaceous, glabrous, from 8 >to 12 inches m length, 

 oblong-lanceolate and slightly acuminate, bipinnate, the point simply 

 pinnate. Pinnae alternate and sessile, oblong-lanceolate, spreading., 

 the base pinnate, the apices hbate-crenate. Pimiules (in a dry state) 

 wrinkled on the upper, surface, 3 lines long, and about 2k lines broad, 

 triangular-ovate, the margin recurved and wencUe, with sunJcen forked 

 veins. Sori distant from the costa, and extending outwards from the 

 base about two-thirds of the whole length of the pinnules. Indusium 



