672 71. POLYPODICM. 



§ 7. SELLIGUEA. Q 



a. Fronds simple. 



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

 ±. Rhizome scales blackish. 



$. jamm k narmw, 4 ' S ^ fii'e.M. bi y mrl. Sort occupying the whole 

 frond. 



<{•. Areolae regular. (223a) P. selliguea. 



+.•{'. Areolae irregular. (2256) P. Bolsteri. 



§.§. "Frm t di brmdoT i ^j ^ « 5 mM t irmtd t Sori confined to the up- 



per *l3 — '/s "f '^ frond. (224) P. interruptum. 



l.±. Rhizome scales brown. 



2. Primary areolae + regularly subquadrate. 



3. Fertile fronds + 7i X 'J* ^9 ^ '^^ barren ones. 



(225) P. regulare. 

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



4L. Fronds mostly 5—25 cm. long. (226) P. Hosei. 

 ^.S:. Fronds mostly 25—45 cm. long. 



(227) P. macrophyllum. 



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



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

 c. Sori superficial. 



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



base. (229) P. pedunculatum. 



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



suddenly, the base not or hardly decurrent. 



e. Barren fronds deltoid-oblong, truncate at the base; 



rhizome scales scariose-edged. (230) P. Elmeri. 



e.e. Barren fronds ovate-oblong to lanceolate, rounded to 



cuneate at the base, or the rhizome scales not 



scariose-edged. (231) P. Feei. 



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



a,a. Fronds deeply pinnatifid or pinncUe. 



+. Segments decurrent. (235) P. ellipticuni. 



f.f . Segments not decurrent. (234) P. Maingayi. 



(*) See also § 6, b", Pleuridlam, under a.a. 



