71. POLYPODIUM. § 6. PLEOPELTIS. b*. LEPISORUS. 629 



X.X.Barren fronds under 2 c.M. long. 



(1436) P. damunense. 

 f.f. Fertile fronds repand or slightly lobed. 

 ^. Repand. Sori on the lobes. 



(144) P. nummularium. 

 ^.^. Lobed. Sori on the anterior side of the lobes. 



(145) P. hammatisorum. 

 e.e. Sori distinctly immersed. 



•{•. Fertile fronds lanceolate in the lower, linear in the 



soriferous upper half. (146) P. stenopteris. 



^•f. Fertile fronds linear-lanceolate. (147) P. soridens. 



ce; Fronds uniform or nearly so, the fertile ones sometimes narrower 



and longer stalked. 



f . Sori superficial or slightly immersed. 



2. Sori in i row on each side of the midrib. ^ 

 3. Fronds small, under 3 c.M. long. 



;)s. Fertile fronds cuneate at the base. 



(148) P. neglectum. 

 :tc.>K. Fertile fronds rounded at the base. 



(149) P. rudimentum. 

 3.3. Fronds larger, 5 — 30 c.M. long. 



4.. Sori submarginal. (ISO) P. subecostatum. 



4.4. Sori distant from the margin. 



S. Fronds lanceolate-oblong, rostrate, 5 — iO 



C.M. long. (1^1) P. rostralum. 



S.S. Fronds linear-lamceolate, not rostrate, iO — 



30 C.M. long. (152) P. lineare. 



9.9. Sori in 2 rows on each side of the midrib. 



>K. Fronds lanceolate-oblong, under i5 c.M. long, short- 

 stalked. (153) P. Porbesii. 

 :)(:.:)(.. Fronds linear-lanceolate, more than 45 c.M. long, 

 long-stalked. (1S4) P. induratum. 

 J.Jf. Son distinctly immersed. 



a. Sori nearer the edge than the midrib. 



p. Sori round. (IBS) P. stenophyllum. 



iS.jS. Sori oblong. (156a) P. revolutum. 



(1666) P. productum. 

 a.a. Son distant from the margin. 



