VI. POLYPODIACEAE. § 9. GRAMMITIDEAE. 123 



X. Lateral veins wanting, or the sori covering the costa at full 

 maturity. No. 68. ■lonograinina. 



2.x. Lateral veins present; sori always more or less remote from 

 the costa. 



3. Fertile fronds proportionally very thick ; paraphyses wanting. 



No. 69a. ScleroglofiiSiiiii. 

 3.3. Fertile fronds mostly thin; paraphyses present. 



No. 69. Wittaria. 

 ±.1. Lateral veins present, anastomosing variously. (Taenitideae). 

 a. Lateral veins anastomosing near the costa only. 



No. 70a. Brainea. 

 «.«. Lateral veins anastomosing more copiously. 



h. Costa wanting at least in the upper part; areolae longitud- 

 inally elongated. (No. 64. Antfophyum). 

 h.h. Costa distinct quite to the apex, areolae not longitudinally 

 elongated, at least in the barren fronds. 

 o. Rhizome scaly. No. 65. Ijoxogrumntu), 

 c.c. Rhizome hairy or fibrillose. No. 70. Taeiiitis. 



§ 10. POLYPODIEAE. 



«. Sori round, if elongated, then not more than about 3 X as long as 

 broad. 



6. At least the under surface covered with scattered or more or 

 less crowded, stellately branched hairs. No. 72. Cyclophorus. 

 6.6. Fronds naked or scaly, if hairy, then the hairs not stellately 

 branched. 



c. Fronds incised or divided; sori restricted to the much 

 contracted higher segments. 



d. Fronds solitary on short, speciaUzed, lateral branchlets 

 of the rhizome. No. 73a. Thayeria. 



d.d. Fronds not solitary on specialized branchlets of the 

 rhizome. 



e. Sporangia springing from the veins and the 



parenchyma. No. 74. Dryostacliyuiu. 



e.e. Sporangia springing from the veins only, not from 



the parenchyma. No. 74a. Aglaomoi'pha. 



