174 
P. angui.are. Angular-leaved Shield Fern. Fig. 1731. 
Frond lax, bipinnate; pinnules truncate below, distinctly stalked. 
Sheltered woods. 2-3 ft. Perenn. July, Aug. E. B. S. 2776. E. B. 2. 
1418. II. ^ Am. 5 84. Bab. 4.423, 5.425. N. 173. S.F. 18. 
Genus 6. Cystopteius. 
C. fragilis. Brittle Bladder Fern. Fig. 1732. 
Frond lanceolate, bipinnate; pinnae lanceolate, pinnules ovato-lan- 
ceolate, sharply toothed. Rocks and walls. 2-12 in. Perenn. July. 
E. B. 1. 1587. E. B. 2. 1427. //. ^ Am. 587. Bab. 4. 423, 5. 425. 
N. 155. S.F. 19. 
C. angustata. Narrow Bladder Fern. Fig. 1733. 
Frond oblong-lanceolate ; pinnules lanceolate, acute, cut, more or less 
decurrent. Loose stone fences. 4-10 in. Perenn. July. E.B.S. 
2790. E. B. 2. 1428. N. 156. S.F. 20. 
C. dentata. Toothed Bladder Fern. Fig. 1734. 
Frond lanceolate, bipinnate; pinnules ovate, blunt, bluntly toothed. 
Rocky places. 4-6 in. Perenn. July. E. B. 1. 1588. E. B. 2. 1426. 
Bab. 4. 424, 5.425. N. 154. S.F. 21. 
C. alpina. Alpine Bladder Fern. Fig. 1735. 
Fronds lanceolate, bipinnate ; pinnules confluent, oblong-ovate, deeply 
pinnatifid; lobes broadly and shortly linear, with two or three erect 
blunt teeth. Low Leyton, Essex. 4 in. Perenn. July. E.B. 1. 
163. E.B. 2.1429. II. fy Am. 587. Bab. 4. 424, 5. 426. S.F. 23. 
C. Montana. Mountain Bladder Fern. Fig. 1736. 
Fronds triangular, tripinnate; pinnae and pinnules spreading, lohes 
toothed at the apex. Scotch mountains. 6-8 in. Perenn. Aug. 
II. Am. 587. Bab. 4.424, 5. 426. N. 98. S. F. 24. 
C. Dickieana. Broad-leaved Bladder Fern. Fig. 1737. 
Fronds ovate-lanceolate, pinnae overlapping. A variety of C. dentata. 
Near Aberdeen. 3-4 in. Perenn. Aug. N. 93. S. F. 22. 
Tribe 3. Asplenieje. 
Genus 7. Athyrium. 
A. Filix-fcemina. Lady Fern. Fig. 1738. 
Fronds lanceolate, pinnate; pinnules linear-oblong, deeply serrated. 
Damp woods. 1-5 ft. Perenn. June, July. A. if. 1.1459. E.B. 2. 
1438. H. fy Am. 589. Bab. 4. 425, 5.426. N. 207. S.F. 25. 
Genus 8. Asplenium. 
A. fontanum. Smooth Rock Spleenwort. Fig. 1739. 
Fronds linear-lanceolate, rigid; pinnules obovatc, with a few large 
mucronate teeth. Walls; rare. 4 in. Perenn. June-Sept. E.B. 1. 
2024. E.B. 2.1439. II. ^ Am. 589. Bab. 4. 4 25, 5.427. S.F. 26. 
A. lanceoi.atum. Lanceolate Spleenwort. Fig. 1740. 
Fronds lanceolate, bipinnate; pinnules obovate, deeply and sharply 
toothed. Sori short, nearly marginal. Rocks and old walls. 2-18 in. 
Perenn. June-Sept. E. B. 1. 240. E. B. 2. 1436. II. fy Am. 588. 
Bab. 4. 425, 5. 427. N. 249. -8. F. 27. 
