7 



soft, rusty- coloured hairs, 2£-4 in. 1., 1^-2 in. w., rachis winged, pinnae close or somewhat distant, J-l 

 in. 1., 4-6 li., w., oblong, deeply pinnutely-parted, the inner divisions being again twice or thrice cut, 

 final segment narrow, 2-3 li. 1., ^-i li. w., blunt ; 



sori small, terminal on the lateral divisions of the upper segments ; 



involucres ovate-oblong, the base shortly immersed, lips rounded, hairy. (II. gratum, Fee, Fil, 

 Ant., t. 30, fig 2.) 



Infrequent in forests of the eastern parishes at 2,000 ft. alt. and upwards. 



Intermediate in size and general character between ciliatum and hirtellum. The involucres are so 

 thin as often to appear reticulated from the pressure of the sporangia within. 



21. H. rnicrocarpum, Desv. 



Fronds ovate lance-shaped, broadest at the base, tapering to a long point, thin and elastic, dark, 

 more or less hairy or without hair, 3-7 in. 1., 1^—3^ in. w., thrice or four times pinnately-parted, rachis 

 winged, segments close, oblong-lance-shaped, tapering to a long point, the base expanded on the upper 

 and cut away on the under side, 1-2^ in. 1., £-§ in. w., divisions close, oblong, deeply cut into several, 

 close, narrow lobes which are 1-2 li. 1., \-\ li. w. ; 



sori very small, terminal on the lobes of the outer part or of all the segments ; 



involucres small, ovate, broader than the constricted end of the leaf-segment, lips pointed or acute, 

 base wedge-shaped, not hairy. 



Frequent on rocks, banks, &c, between 3,000 and 6,000 ft. alt. 



The size and surface of the frond vary a good deal, and the largest and least clothed plants seem 

 to grow at the higher elevations. 



22. H. hirtellum, Swartz. 



Fronds ovate, tapering to a long point, dark, and covered with rusty-coloured grouped hairs 3-6 

 in. 1., l|-3 in. w., thrice or four times pinnately divided, rachis winged upwards, free below, pinnae 

 close, lance-shaped, mostly with tapering points. 1-2 in. 1., in. w., twice-pinnately-divided, divisions 

 ovate-oblong,j4-ti li. 1., 2-3 li. w., without stalk and adherent at the base to the rachis, deeply pinnately- 

 divided, ultimate divisions narrow, close, 3-0 to a side, \~\ li. w., the free part 1-2 li. 1. ; 



sori terminal, spherical ; 



involucres nearely spherical, immersed about half their depth, covered densely with woolly, grouped 

 hairs. 



Common, chiefly in the middle altitudes, from 1,000 ft. upwards, in forests and wayside banks. 

 The spherical involucres, usually dense hairiness, and absence of membrane to the base of the 

 rachis distinguish it from rnicrocarpum. 



23. H. Catherines, Hook. 



Fronds stiff and wiry, very thinly membranous, hairs in sparse groups, dark, 1^-3 in. 1., ^J- 1 

 in. w., oblong-lance-shaped, thrice pinnately divided, rachis very narrowly margined in the upper part, 

 pinnae spreading ^ - f in. 1., | in. w., without stalks, close, pinnately divided or twice-pinnately-divided, 

 oblong or ovate, the divisions simple, forked, or pinnately divided, final divisions very narrow £ J li. w., 

 1-2 li. 1., lax ; 



sori minute, terminal on the lobes of the upper half of the frond, few or many ; 

 involucres conspicuously wider than the leaf-segment, lips hairy, open, often much exceeding the 

 sori, and wavy. 



Common on trees in forests above 4,000 ft. alt. 



Though exceedingly slender in all its parts and much divided, this is the most wiry and stiffest 

 species of all. The valves of the involucres often gape considerably, occasionally turuingjquite down 

 irom the sori within. 



(To be continued.) 



