CXLIII. FILICES. 459 
Suborder 2. Cyatheeze. Vernation circinate. Trunk woody. Sori 
dorsal, of many capsules, which are sessile or nearly so, open at the side, 
and have a slightly excentric vertical ring. 
Sori at first enclosed in a complete cup 2h. <biala eeeA Deals 
Cup very incomplete . ... . . . . . 3&8. HEMITELIA. 
Suborder 8. Polypodieze. Vernation circinate. Trunk in none of the 
Cape species arborescent, the sori usually dorsal, of numerous capsules, 
which open down the side, and have an incomplete vertical ring, except in 
Hymenophyllee, which see. 
Tribe 1. DicksontEm. Frond herbaceous ; sori dorsal enclosed in a 
complete cup. 
Mieroaly conus 2. es a ee Ae Woops. 
Tribe 2. HyMENOPHYLLE®. Frond beautifully pellucid ; sori terminal, 
enclosed in a complete cup; ring of capsule almost transverse, and dehis- 
cence subvertical. 
Cup shallow, 2-valved, being split half or i 
down to the base. . . . 5, HYMENOPHYLLUM. 
Cup many times deeper than broad, ‘entire or 2- 
valved at the apex only . . .. . . . . 6, TRICHOMANES. 
Tribe 3. DavatLIEx%. Involucre attached by the base on the side of the 
sorus furthest from the edge of the frond, roundish or oblong, not forming 
a complete cup. 
Involucre (in Cape species) attached by the sides 
and base. gare in eM be ee a. 
Involuere attached by the base only Se ee eee eo OC YSTOPEERTS: 
Tribe 4. Linpsay. A 2-lipped involucre in a line along the edge of 
the frond, enclosing the linear sori. 
ErOMVeCe NUS 2). on a. et lh oY ot oro | 9: TuENDS AIAN 
Tribe 5. PrerrpE#. Sori marginal, round or linear. Involucre formed 
of the more or less modified edge of the frond, and wrapped over the sorus. 
Sori from the under side of the recurved edge of 
the frond, in Cape species globose. Texture of 
frond papery, veining fan-like . . . . . 10. ADIANTUM. 
Sori erect, with the edge of the frond wrapped 
over them, 
Sori globose, confined to the sinuses of the 
frond, always distinct, veins not uniting . . 11. Hypoueptis. 
Sori oblong or linear, confined to the sinuses of 
the frond. Veins joining copiously. . . 12. Loncuiris. 
Sori at first globose, but, together with the invo- 
lucres, becoming more or less confluent . . 13. CHEILANTHES. 
Sori and involucres linear, but not absolutely 
continuous. Fronds small and coriaceous . 14, PELLmA. 
Sori and involucres quite linear and continuous, 
occupying the edge of the segments only. 
Fronds large and herbaceous, barren and fer- 
tile nearly alike. . 15. PTERIs. 
Like Pteris in the sori, but the frond small and 
rigid, and like a Fan-palm in miniature . . 16. ACTINIOPTERIS. 
Sori and involucres quite linear and continuous, 
