﻿206 22. DRYOPTERIS. § 2. NEPHRODIUM. 



h. Lower pinnae slightly, if at all, reduced, not dwindling down into 

 mere auricles ('); the fronds occasionally with a single pair of 

 dwarfed or reduced pinnae at the base. 

 c. Fronds under 30 c.M. long. Under surface glandular and + 

 hairy. (80) D. pilosiuscula. 



c.c. Fully developed fronds more than 30 c.M. long. 



d. Fronds rather dimorphous ; fertile pinnae distinctly narrower than 

 the barren ones. Under surface short-hairy and glandular. 



(8i) D. glandulosa. 

 d.d. Fronds not dimorphous. 



e. Sori contiguous, forming transverse bands of brown lines close 

 to the main veins. (82) D. cyalheoides. 



e.e. Sori not contiguous, rather distant from the main veins. 

 f. Veins 8 — i4 on each side of the main veins. 



(83) D. urophylla. 

 f.f. Veins i5 — 20 on each side of the main veins. 



(84) D. nioulmeineusis. 

 h.h. Lower pinnae conspicuously reduced or dwindling down into mere 

 auricles. 

 c'. Surfaces naked. 



d'. Veins 3 — 5 on each side of the main veins. (85) D. latipiiina. 

 d'.d'. Veins 6 — 8 on each side of the main veins. (86) D. aborliva. 

 c'.c'. Under surface + hairy, at least on the veins. 



§. Lower pinnae suddenly reduced. (87) D. megaphylla 



$.$. Lower pinnae gradually reduced. 

 •{•. The 2 — 3 lower veins anastomosing . 



;^<. Fronds iO—20 c.M. broad. (88j D. arbuscula. 



*.*. Fronds 20 — 30 c.M. broad. (89) D. amboinensis 



f.-i>. The 5 — 6 lower veins anastomosing. (9'>) D. multilineata. 

 a.a. Pinnae cut from ^/^ — ^j^-way down to the costa. 

 h'. Texture ± coriaceous. 



c'. Lower pinnae slightly, if at all, reduced; the fronds occasionally 



with a single pair of dwarfed or reduced pinnae at the base (^). 



d'. Stipe and rachis purveyed with large, distant glands, those of 



the rachis placed on the under side at the base of the pinnae. 



(91) D. callosa. 



(^) See also D. Ifneata, C. Ctir. 



(') See also D. crassitolia & echlnata» 0. Ktze, 



