SYNOPSIS OF THE GENERA 
or 
DERBYSHIRE EERNS. 
Order 1. Capsules with a jointed ring, more or less complete. 
POLYPODIACEJ5. 
Tribe 1. Polypodiacece. Fruit on the back of the fronds. 
1. With a linear involucre, near the midrib 
2. With a linear involucre, marginal 
3. With a linear involucre, near the margin 
4. With a linear oblong involucre, opening on the inner side 
5. With a linear oblong involucre, opening centrally 
6. With a kidney-shaped involucre 
7. With a nemarginate, or orbicular involucre 
8. Sori roundish clusters, scattered. Involucre reniform 
9. With a hood-shaped involucre becoming cup-sliaped 
10. Fruit without an involucre 
11. Fruit mixed with chaffy scales 
Tribe 5. Fruit in a two-lobed cup, marginal 
Tribe 8. Fruit with traces of a jointed ring, two-valved, terminal 
to the frond 
Pag* 
Blechnum 11 
Pteris 12 
Cryptogramma. . . viii 
A&plenium 14 
Scolopendrium . . . 19 
A thy mum 1-1 A 
Polystichum... 9-10 
Lastroea 2 
Cystopteris 13 
Polypodium 6 
Ceterach 18 
Hymenophyllum viii 
Osmunda 20 
{Order 2. Fruit dorsal, without a jointed ring. Marsiliacece.) 
Order 3. Fruit marginal, without a jointed ring. 
OPHIOGLOSSACILE. 
1. Fruit terminal to the branch, spiked Ophioglosfum ...21 
2. Fruit terminal to the branch, spike-compound Botrychium 22 
