SM 71. POtTPODIUM. § 1. BtPOLTPODrOM. d. PIHHATAE. 



a. Stipes naked. 



e. Stipes under i\ e.M. long; fronds erect. 



f. Costae forked. (60) P. cornigerum. 



f.f. Costae pinnate. (61) P. inconspicuum. 



e.e. Stipes longer; fronds pendulous. (62) P. undosuni. 



d.d. Stipes hairy. (65) P. minutam. 



c.c^. Pinnae sharply toothed. (64a) P. serrato-dentatum. 



cccc. Pinnae bhmtly toothed. (646) P. Merritti. 



h.h. Fully developed fronds more than i2\ m.M. broad ('). 



1. Texture herbaceous or papyraceous; fronds often pendulous. 

 •{>. Surfaces hairy. 



:tc. Pinnae entire or slightly crenate to repand. 

 X. Pinnae very narroHo, + i fn.M. broad. 



(6S) P. subrepandulum. 

 x.x. Pinnnae broader, + 2 m.M. broad. 



+ Sori not contiffumts^ rather distant. 



(66)^ P. subminutum 



+ + Sori contiguous. 



(67) P. lancifolium. 

 :if:.^. Pinnae toothed or lobed on i or both sides. 



A. Pinnae incised on the upper side only, the apex en- 

 tire or slightly toothed. (68) P. subsecundo-dissectum. 

 h,i^. Pinnae incised on both sides. (69) P. sabfalcatum. 

 +••{•. Surfaces ± naked or glabrescent, but the rachis often hairy. 

 0. Sori superficial or slightly immersed. 



■h. Rachis naked. (70a) P. repandulum. 



■+.+. Rachis hairy. (706) P. erythrotrichuni. 



O.O- Sori deeply immersed. 

 +. Sori round. 



X. Pinnae narrow, ± i — 2 m.M. broad. 



(71) P. brevifrons. 

 •K.x. Pinnae broader, + 4—5 m.JI!f. 6roa<^. 



(72) P. papUlosum. 

 +.+. Sori obUmg. (73) P. obliquatum. 



(74) P. Schenkii. 



(*) See also P. IncoBsplcaam, ttl. 



