122 VI. POLYPODIACEAE. § 8. GYMNOGBAMMEAE. 



C.C. Venation not dichotomo-flabellate. 



«f. Fronds or leaflets entire or toothed ; lateral veins simple 



or forked. No. 62. Coniogramma. 



d.d. Fronds or leaflets lobed or pinnatifid ; main veins 



pinnate. (No. 60a. Phegopteris). 



«.«. Veins anastomosing variously. 



I. Costa wanting at least in the upper part. , 



No. 64. Aiitrophyuni. 

 1.1. Costa distinct quite to the apex. 



2. Veins anastomosing near the costa only. 



• Lateral veins simple or forked; sori confluent at the 

 base. (No. 70a. Braineu). 



*"* Main veins pinnate; sori free, or confluent at the apex. 

 f Lovfer veins of contiguous groups uniting as in 

 Nephrodium; costal areolae rather deltoid or sub- 

 deltoid. (No. 60a. Phegopteris). 

 •j-f Lower veins of contiguous groups uniting as in 

 Pleocnemia; costal areolae trapezoidal or nearly so. 

 (No. 606. Dictgoptevis). 

 9.2. Veins anastomosing otherwise, often copiously and irregularly. 

 3. Main veins distinct at least in the barren fronds. 

 •{• Sori running in parallel lines. 



No. 67a. Heiuigraiuiua. 

 f f Sori running in various directions. 



No. 675. Cauipylogiramina. 

 3.3. Main veins wanting or indistinct. 



1. Sori copiously reticulate throughout. 



No. 67. Hemionilis. 

 J.J. Sori parallel, free, or uniting near the apex only. 

 5. Areolae hidden, with free veinlets. 



No. 65. Ij»xograiiiiiia. 

 5.5. Areolae distinct, or without free veinlets. 



No. 66. Syngi'aiuiiia. 



§9. GRAMMITIDEAE. 



1. Lateral veins wanting or free, at least in the barren fronds. (Vittarieae) . 



