﻿VI. POLYPODIACEAE. § 9. GRAMMITIDEAE. 133 



2. Sori on or close to the costa, often protected by a lateral, raised 

 outgrowth of leaf tissue. No. 68. Mwaograinuie. 



2.2. Sori marginal or submarginal. 



3. Sori + deeply immersed in mostly 2-lipped, marginal or sub- 

 marginal grooves or with the margins rolled back over them 

 when young. Midrib present, veins free. No. 69. Yittaria.. 

 3.3. Sori not protected as in 3. Midrib wanting, veins anas- 

 tomosing. (No. 64. AntropUynm, p. p.). 

 1.1, Fronds pinnate, rarely simple, but then not grass-like. Veins anas- 

 tomosing. {Taenilideae). No. 70. TaeilitiiS. 



10. POLYPODIEAE. 



a. Sori punctiform, roundish or oblong, not more than ± 3 X sis long 

 as broad, many on each side of the costae, sometimes solitary and 

 terminal on the segments. 



h. At least the under surface covered with scattered or more or less 

 densely crowded stellately branched hairs. No. 1%. CyclopboruiS. 

 h.h. Fronds naked or scaly, not rarely hairy, but then the hairs simple, 

 not stellate. 



c. Fronds dimorphous. Barren fronds sessile, oakleaf-like, after- 

 wards brown and rigid, fertile ones stipitate, pinnatifid 

 or pinnate. No. 75. Drynaria. 



c.c. Fronds uniform or dimorphous, if dimorphous the barren fronds 

 not as in c. 



d. Fronds deeply pinnatifid. Sori restricted to the higher, 

 much contracted segments. 



e. Sori oblong or subquadrangular, closely placed in 1 row 

 on each side of and parallel to the costae. 



No. 74. Dryostachyum. 

 e.e. Sori round, placed on distant, semiorbicular lobes, 

 1 to each lobe. 



No. 71. Polypodium {Meyenianum). 



d.d. Fronds simple or divided. Sori dorsal, marginal or on 



marginal outgrowths, but not on conspicuously contracted 



upper segments of divided fronds. No. 71. Polypodium. 



