﻿644 ?!. POLYPODIUM § 6. PLEOPELTIS b**. PLEURIDIUM. 



1'. Fronds small, under i5 c.M. long. 



if.. Rhizome scales fihrillose, yellowish. Sori rather large, superficial. 



(183) P. oodes. 

 >K.*« Rhizome scales lanceolate, pale-brown. Sori rather small, subim- 

 mersed. (184) P. dulitense. 



±'.±'. Fully developed fronds more than 15 c.M. long. 

 3'. Texture membranaceous or herbaceous. 

 $. Rhizome naked. 



^. Fronds short-stalked. (185a) P. suboppositum. 



^.if. Fronds long-stalked. (185ft) P. Scortecbinii. 



$.$. Rhizome scaly. 



X. Sori irregularly i — Z-serial. (186a) P. ovatum. 



x.x.Sori numerous. (1866) P. Zollingerianum. 



3'.2'. Texture chartaceous to coriaceous. 



3'. Fronds commonly ± 2^1^ — 6^j^ c.M. broad. (*) 



A'. Stipes stout, narrowly winged by the gradually decurrent 



base of the fronds. (187) P. millisorum. 



•if'. J'. Stipes short or wanting, not winged. Fronds ± blunt 



at the base. (188) P. punctatum. 



3', 3f. Fronds commonly broader, ± 6^1^ — 20 c.M. broad. 



$. Fronds cordate or rounded at the base. 



(189) P. musifolium. 

 §.$. Fronds gradually narrowed at the base. 



if. Rhizome short, thick. (190a) P. validum. 



if. if. Rhizome scandent, slender. 



(1906) P, monstrosum. 



* (167) P. <;oiStulatuiii, JJfc., Journ. of Bot., XVIII, 215; Acrosfi- 

 chum costulatum, Ces., Fel. Becc. Polin., 5 & 8 ; Drymoglossum rigidum. Ilk.) 

 var. longistipitatum, Cbrist, MS. in Herb. Bog. 



Rbizome wide-creeping, slender, woody; scales erecto-patent, lanceolate' 

 subulate, brownisb or bleached, the base roundish, dilated, peltate. Stipes 

 2^2 — 15 c.M. long, those of the fertile fronds the longest, scattered, naked, 

 erect. Fronds dimorphous. Barren fronds ovate or deltoid-oblong, obtuse, 



(*) See also P. monstrosum, Copel. 



