﻿71. POLYPODIUM. 569 



*. Lieplsoras. Main veins indistinct, not rarely wanting. 

 +-f. Pleurldium (incl. Microsorium). Main veins distinct nearly or 

 quite to the edge. 

 c. Cbrysopteriis. Rhizome and scales as in b. Fronds lobed, pin- 

 natifid or pinnate. 



■^. Phymatodes. Fronds stipitate, lobed or pinnatifid. 

 ^*. Pbymatopsis. Fronds stipitate, pinnate. 

 *^c+. Drynarlopsls. Fronds sessile, lobed, pinnatifid or pinnate. 



Fertile segments not contracted. 

 =f-^**. Aglaomorpha. Like ^^+ but the sori restricted to the much 

 contracted higher segments. 

 § 7. SELLIGUEA. Venation as in § 6. Sori linear or linear-oblong, more 

 than 5 X as long as broad, continuous or interrupted, rarely abbrevia- 

 ted or round, more or less oblique to the costa. Fronds simple or 

 pinnate. Hk. Bk., 1. c, tab. VJ, fig. 52, e— f. (*) 



Key to the malayan sections and groups. 



a. Veins quite free. 



h. Sori superficial, or immersed in dorsal or submarginal pits, but not 

 as in h.h. § 1. EUPOLYPODIUM. 



c. Fronds simple, lobed, pinnatifid or forked. 



d. Fronds simple. § 1' a- Intej^rifoliae. 



d.d. Fronds lobed or pinnatifid. § 1, c. Pinnatificlae. 



d.d.d. Fronds 1—2 X forked. § 1, b. Furcatac. 



C.C. Fronds ± pinnate or more compoundly divided. 



jfc. Fronds pinnate, the pinnae distinct or slightly confluent at 



the base. § 1. d. Piiinatac 



*.*. Fronds at least 2-pinnatifid. § 1, e. Compositae. 



h.h. Sori immersed in saccate or indusium-like, marginal or submarginal 



depressions. Fronds simple to deeply pinnatifid. § 2. PROSAPTIA. 



a.a. Veins free, forked, the anterior branch of the veins not rarely reaching 



to the posterior branch of the next higher vein so as to form a row of 



regular costular areolae; the posterior veinlet always free towards the 



margin of the frond. Fronds deeply pinnatifid. P. Cesatianum, Bk. 



a.a.a. Veins anastomosing more or less copiously. 



(*) This section would perhaps hetter be treated as a distinct genus. 



