17G 
Tribe 4. Adianteje.— Genus 12. Blechnum. 
B. boreale. Hard Fern. Fig. 1751. 
Fertile fronds pinnate ; pinnae linear, acute. Barren fronds pec¬ 
tinate, pinnatifid ; pinnae broadly linear. Woods. G in.-2 ft. Perenn. 
July. E.B. 1. 1159. E.B. 2.1441. II.fyArn. 590. Bab. 4.427, 
5.429. Ah 17. S.F.37. 
Genus 13. Pteris. 
P. aquilina. Common Brake. Fig. 1752. 
Fronds tripartite; branches bipinnate; segments oblong, obtuse. 
Heaths and moors. 6in.-8ft. Perenn. July. E. B. 1.1G79. E.B.2. 
1442. H.fyArn. 590. Bab. 4.427,5.429. N. 23. S. F. 38. 
Genus 14. Adiantum. 
A. Capillus-Yeneris. Maiden-hair. Fig. 1753. 
Frond irregular; pinnules roundish-wedge-shaped, lobed. Sea-caves 
and rocks. 3-12 in. Perenn. May-Sept. E. B. 1.1564. E.B.2. 
1444. H. Am. 591. Bab. 4.428,5.429. Ah 1. S.F. 40. 
Tribe 5. Hymenophyllea— Genus 15. Trichomanes. 
T. radicans. Bristle Fern. Fig. 1754. 
Fronds 3-4 times pinnatifid, glabrous. Involucres solitary, in the 
axils of the upper segments. Dripping rocks, Ireland. 3-12 in. 
Perenn. Sept., Oct. E.B.\.\4\7. E.B.2.\44b. H. Am. 591. 
Bab. 4. 428, 5. 429. Ah 283. S.F. 41. 
Genus 16. Hymenophyllum. 
H. Tunbridgense. Filmy Fern. Fig. 1755. 
Fronds pinnate, membranaceous; pinnae distichous. Involucre 
solitary, compressed, spinosely serrate. Damp moss. 1-4 in. Perenn. 
Aug. E.B. 1. 162. E.B. 2.1446. H.fy Am. 592. Bab. 4. 428, 
5.430. N.297. S.F. 42. 
H. Wilsoni. Scottish Filmy Fern. Fig. 1756. 
Fronds pinnate; pinnae recurved. Involucre stalked, inflated, entire. 
Damp moss. 1-4 in. Perenn. Aug. E. B. S. 2686. E.B. 2. 1447. 
H. \Am. 592. Bab. 4. 428, 5. 430. N. 301. S.F. 43. 
Suborder 2. Osmundacejs. 
Tribe 6. Osmundeje.— Genus 17. Osmunda. 
O. regalis. Flowering Fern. Fig. 1757. 
Fronds bipinnate; pinnules oblong. Fructification in panicles, ter¬ 
minal. Margins of rivers and lakes. 1-1 lft. E.B. 1.209. E.B. 2. 
1448. H. fy Am. 593. Bab. 4.429,5.430. Ah 307. S.F. 44. 
Suborder 3. Opiuoglossace,®. 
Tribe 7. Ophioglosseje.— Genus 18. Botrychium. 
B. Lunaria. Moonwort. Fig. 1758. 
Frond pinnate ; pinnae fan-shaped, notched. Commons and pastures. 
3-G in. Perenn. Aug. E. B. 1. 318. E. B. 2. 1449. H. fy Am. 
594. Bab. 4. 429,5.430. Ah 313. S.F. 45. 
Genus 19. Ophioglossum. 
O. vulgattjm. Common Adder's-tonyue. Fig. 1759. 
Frond ovate, blunt. Spike club-shaped. Meadows. 2-12 in. Perenn. 
May, June. AM?. 1.108. E.B. 2.1450. H. Am. 593. Bab.4. 
429.5.430. Ah 325. S.F. 46. 
O. lusitanicum. Lesser Adder's-tonyue. Fig. 1760. 
Frond linear-lanceolate. Guernsey. 1-2 in. Perenn. Jan. Bab. 4. 
429.5.431. Ah 331. S.F. 47. 
