570 71. POLTPODIUH. 



£. Veins forming 1 or more rows of regular areolae + as in Nephro- 

 dium, each with a single, simple or rarely forked, included, excur- 

 rent free veinlet. Sori terminal on the free veinlets, often confined 

 to the costal areolae only. Fronds pinnate in malayan material. 



§ 3. GONiOPHLEBIUM. 

 $. Pinnae broadly adnate to the rachis. § 3, c. Marginaria. 

 S.S. At least the lower pinnae stalked^ or sessile with a cuneate to 

 truncate, not aduate hase. § 3, d. Schellolepis. 



*.*. Veins forming commonly more or less irregular areolae. Included 

 free yeinlets wanting or present hut then spreading in various di- 

 rections, rarely directed towards the costa or the margin only, 

 but not + as in 1. 



S. Sori linear or linear-oblong, more than 3 X as long as broad, 



more or less oblique to the costa and margin, continuous or 



interrupted. Fronds simple or pinnate. § 7. SELLIGUEA. 



2.S. Sori round or oblong, very rarely more than 3 X as long as 



broad, if much elongated then always parallel to the costa or 



the margin. § 6. PLEOPELTIS. 



3. Rhizome scales peltato-orbicular or wanting. Rhizome inflated, 



+ cylindrical or tuberous, soon cavernous and inhabited 



by ants. § 6, a. Myrinecopliila. 



•^. Fronds simple, pinnatifid or pinnate. Sori not on 



marginal outgrowths. Rhizome scales peltato-orbicular. 



§ 6, a^. Aspldopodlaro. 

 f.f. Fronds pinnatifid or pinnate. Sori on specialized, mar- 

 ginal, tooth- or lobe-like, mostly inflexed outgrowths 

 of the fertile segments. Rhizome scales wanting. 



§ 6, a^^. liecanopterls. 

 3.3. Rhizome scales oval, oblong, ovate, lanceolate, linear or 

 subulate, very rarely wanting or orbicular. Rhizome not 

 as in 3, solid. 



£. Fronds simple. % 6, b. Atactosia. 



*. Main veins indistinct, often wanting. 



§ 6, b^- liCplsorus. 

 5)c.>K. Main veins distinct nearly or quite to the edge. 



§ 6, b**. Plearldluni. 

 ^.tf. Fronds lobed, pinnatifid or pinnate. 



§ 6, c. Chrysopteris. 



