﻿672 71. POLYPODimt. 



§ 7. SELLIGUEA. 



a. Fronds simple. 



h. Texture herbaceous to papyraceous; main veins commonly fine. 

 1. Rhizome scales blackish. 



§. Fronds narrow, i — ^'/j c.M. broad. Sori occupying the whole 

 frond. 



f. Areolae regular. (223«) P. selliguea. 



f .f . Areolae irregular. (2236) P. Bolster!. 



$.S. Fronds broader, ^'/j — 5 c.M. broad. Sori confined to the up- 

 per Vj — ^2 ^/ ^'*^ frond. (224) P. interruptum. 

 l.I. Rhizome scales brown. 



3. Primary areolae + regularly subquadrale. 



3. Fertile fronds + % X ^* ^^^O ^^ '^^ barren ones. * 



(225) P. regulare. 



3.3. Fertile fronds not or hardly shorter than the barren ones. 



4:. Fronds cuspidate, short-stalked, + W — 25 c.M. 



long. (226) P. Hosei. 



4./i. Fronds acute, rather long-stalked, ± 25 — 45 c.M. 



long. (227) P. macrophyllum. 



2.2. Primary areolae irregular. (228) P. spurium. 



b.b. Texture coriaceous or subcoriaceous: main veins mostly prominent. 



c. Sori superficial. 



d. Lower part of the frond suddenly narrowed into a dccurrent 

 base. (229) P. peduiiculatum. 



d.d. Lower part of the frond suddenly or gradually narrowed, if 

 suddenly, the base not or hardly decurrenl. 

 e. Rarren fronds obtuse, truncate at the base, fertile ones 

 acute at both ends. (230) P. Elmeri. 



e.e. Roth barren and fertile fronds + acute at both ends. 



(251a) P. Feci. 

 (23l/>) P. calophlebium. 

 V.C. Sori immersed. (252) P. heterocarpum. 



it.a. Fronds deeply pinnatifid or pinnate. 



f. Segments decurrent. (233) P. elliplicum. 



•^.f. Segments not decurrent. (254) P. Maingayi. 



(*) See also § 6, b", Pleurldium, under «.«. 



