polypodiacejE. 271 



the frond an oblong-lanceolate form. The laciniaa are short and 

 obtuse, frequently bifid. Indusium of an oblong-ovate form, its base 

 partially immersed in the tips of the laciniae. 



18. Hymenophyllum caudiculatum, Mart. 



Hymenophyllum caudiculatum, Mart, ex Hook. Spec. Fil. 1, p. 102, 



Hab. Organ Mountains, Brazil : growing on rocks and trees. 



Plant from 4 to 6 inches high. Stipe terete, broadly winged, 

 the wings extending almost to the base. Fronds somewhat rigid, 

 erect, broad-ovate or ovate-lanceolate, acuminate, and tripinnatifid, 

 somewhat glossy, and of a dark brown colour when dry ; the primary 

 divisions very much crowded, a little imbricated and spreading, 

 oblong-lanceolate, and terminating in a lengthened caudate point; 

 secondary divisions simple or subpalmate. Laciniaa short, linear- 

 oblong, obtuse, emarginate. Rhachis broadly winged, the wings 

 slightly undulated. Sori supra-axillary or terminal, Indusium large, 

 compressed, two-valved to its base, orbicular, sometimes a little reni- 

 form in shape, and erose on the upper margin. Receptacle short and 

 thick at the end, as in our H. forniosum. 



This is certainly the H. caudiculatum of Martius, as described by 

 Sir William Hooker in his Species Filicum, where he refers a plant 

 from Chiloe to it. The species is well marked by the broadly-winged 

 stipe and rhachis, the long caudate points of the pinnae, and some- 

 times of the points of the fronds also, and the very large orbicular 

 indusia. 



19. Hymenophyllum flexuosum, A. Cwin. 



hymenophyllum flexuosum, A. Cunn. in Hook. Comp. Bot. Mag. 2, p. 369; Hook. 

 Spec. Fil. 1, p. 105. 



Hab. Vicinity of the Bay of Islands, New Zealand; growing 

 among decayed leaves, in humid forests. 



