P0LYP0DIACEJ3. 233 



the superior oblong, dentate-serrate, coadunate and decurrent; the 

 segments oblong, obtuse, also dentate-serrate. Costa of the pinnae 

 very slender, not much thicker than the veins. 



2. Cystopteris Tasmanica, Book. 



Cystopteris Tasmanica, Hook. Spec. Fil. 1, p. 199. 



Hab. Hunter's River, New South Wales. 



Whole plant of a more humble growth, in general, than the G. 

 Douglasii, with a shorter but thicker stipe, which seldom exceeds an 

 inch in length, and bears a few, scattered, slender, scales at the base. 

 Fronds 2 or 3 inches long, oblong or oblong-lanceolate, pinnate. 

 Pinnse broadly-ovate, incisely lobed or pinnatifid; the upper ones 

 decurrent. Segments ovate, obtuse, dentate. Yeins forked, of a dull 

 brown colour. Sori few. Indusium broadly ovate, but we do not 

 find it at all acuminated, as described by Sir William Hooker. 



3. Cystopteris fragilis, Bernh. 



Cystopteris fragilis, Bernh. Jour. Bot. 2, p. 27; Hook. Spec. Fil. 1, p. 197. 

 Aspidium fragile, Sw. Syn. Fil. p. 58; Willd. Spec. PI. 5, p. 280. 



Hab. Yar. a. Culnai and Obrajillo, Andes of Peru. Island of 

 Madeira. Yar. 0. Oregon; on the banks of the Spipen River. 

 Yar. y. Yicinity of Orange Harbour, Tierra del Fuego. 



We have given the plants from the above very distant localities as 

 varieties of the 0. fragilis of Bernhardt The first resembles very 

 much the usual European form of the species, differing principally 

 in the fronds in a dry state being of a darker colour, and in the 

 larger and more numerous sori, which in an advanced state become 

 confluent. In the second variety, from the interior of the Oregon, 

 the fronds are less deeply divided, being scarcely bipinnate; with 

 distant, oblong, obtuse, inciso-lobate pinnae, the inferior pair pinnate ; 

 the lobes or segments ovate, obtuse, dentate, and decurrent; the sori 

 very small and distant. The third variety, from Tierra del Fuego, 



J 59 



