GENERA OF. FERNS. 385 
two unequal fascicles of fertile segments, which are vertically 
unilateral and oppositely conniving. 
Species. 1. A. digitata Sw., 2. A. trilateralis, Schk. 
Ilust. Hook. et Grev. ic. fil. t. 54. Sw. syn. fil. t. 4, f. 1: 
Schk. crypt. t. 136. 
Obs. Mr. R. Brown has long ago remarked that the 
Schizea digitata of Swartz differs from the rest of the genus, 
by its fertile appendices being digitate, and the sporangia 
crowded; whereas in true Schizea, the terminal appen- 
dix is pinnate and the sporangia produced in two rows 
{that is one row on each side of the midrib of the pinne). 
In the two species that I have placed under Actinostachys, 
the sporangia are borne in ¢wo rows on either side of the 
midrib, the attachment of the two rows being on the same 
line; consequently, those of the outer row are, by the pres- 
sure of the inner row, constricted at their base, and somewhat 
oblique. These differences, with a slight disparity in habit, 
distinguish the two genera. 
133. ANEMIA, Sw. J. Sm. 
Fertile fronds tripartite; the two opposite segments con- 
tracted, erect, constituting two unilateral sporangiferous com- 
pound panicles; the third segment sterile, with forked, direct 
free venation. Sporangia oval, vertical, naked. | 
Fronds s/ipitate, pinnate, bipinnate, or decompound ; the 
fertile ones always tripartite, the sterile segment usually spread- 
ing, and much shorter than the erect fertile appendices. 
- Ezamp. 1. A. oblongifolia, Sm. 2. A. hirta, Sw. 3. A. 
collina, Radd. 4. A. caudata, Kaulf. (A. Mandioccana, Radd.) 
5. A. tenella, Sw. (A. repens, Radd.) 6. A. flexuosa, Sw. 
7. A. deltoidea, Sw. 8. A. adiantifolia, Sw. 
Ilust. Hook. gen. fil. t. 90. Hook. et Grev. ic. fil. t. 16. 
Obs. Swartz, Willdenow and others arranged the species 
of this genus under two distinct forms ; the first containing 
those that have their fertile fronds tripartite, two of the 
branches being contracted and fertile, while the other branch 
is sterile; in the greater number so characterised, the vena- 
