﻿126 VI. POLYPODIACE AE. S 2. ASPIDIEAE. 



3.3. Sori scattered irregulary or placed in 2 rows between 

 the main veins. Indusium round or reniform, and if 

 oblong then at best 2 X as long as broad and the 

 fronds not simple. 



^. ExcuiTent soriferous free veinlets 2 — 3 to each 

 areola. Sori not compital. Indusium round. 



No. 26. Cyrtomiiim. 

 4.4. Excurrent soriferous free veinlets wanting or 1 

 to each areola, or the soriferous veinlets spreading 

 into various directions. Sori often compital. In- 

 dusium round or reniform. No. 25. i^ispidiuiti. 



§ 3. DAVALLIEAE. 



a. Sori roundish, dorsal on the veins. No. 27. Cystopteris. 



a,a. Sori roundish, oblong or linear, submarginal, terminal on the veins 

 (or veinlets, which are sometimes very short and inconspicuous), or 

 uniting the apices of 2 or more veins or veinlets. 



b. Fronds divided; leaflets (not the lobes) dimidiate, i. e. the half 

 on the lower side of the midrib cut away. 



No. 29. Eiindisaya. 

 b.b. Fronds simple or divided, if divided the leaflets not dimidiate. 



c. Sori roundish or transversally oblong, occupying the trunc- 

 ate apex of the cuneate, ultimate segments. 



No. 28. Ocloiilos»oria. 

 c.c. Sori occupying the sides, very rarely the apex of not cuneate, 

 ultimate segments. 



d. Sori transversally oblong or linear, uniting the apices of 

 2 or more veins or veinlets. 



•{•. Fronds simple or divided, if divided the leaflets not 

 articulate to the rachis. No. 30. Scbizoloma. 

 f .f. Fronds pinnate, leaflets articulate to the rachis. In- 

 dusium sometimes 2-valved. 



(No. 17. JXephrolepis, § Lindsay opsis). 

 d.d. Sori roundish or oblong, solitary on the vein tips, some 

 of them sometimes confluent. 



