BLECHNUM. TEICHOMANES. 463 



Tribe IV. Adiantece. 



12. Bleoh'nttm Linn. Hard Fern. 



1. B. horedle (Sw.) ; barren fronds pinnatifld with broadly- 

 linear rather blunt pinnse, fertile frond pinnate with linear 

 acute pinnae.—^. B. 1159. H. F. 40. Lomaria Spieant iV. 89. 

 — Each lateral vein of the fertile pinnae extends halfway to the 

 edge, then turns at right angles and proceeds up the pinna until 

 It reaches the next vein. C.ipsules attached in a continuous 

 row to the lougiludinal portions of the combined lateral veins. 

 — Stony and heathy places. P. VII. E. S. I. 



13. Pie'eis Both. Brakes or Bracken. 



1. P. aquiiina (L.) ; fronds tripartite, branches bipinnate, pin- 

 nules linear-lanceolate the lower ones usually pinnatifld, seg- 

 ments oblong^ blunt.— ^. 5. 1679. H.F.m. JV. 93.— Fronds 

 annual, 1 — 5 feet high, very much divided, with spreading 

 branches. Capsules attached to the marginal vein, lying upon 

 a fine membrane and covered by the membranous continuation 

 of the epidermis. Inferior pinnules pinnatifld or sinuate or 

 entire.— Woods and heaths. P. VII. E. S. I. 



14. Adian'ttjm Linn. Maiden-hair. 



1. A. Capillus- Ven'eris (h.) ; frond irregular, branches and 

 roundish-wedgeshaped lobed thin pinnules alternate, lobes of the 

 fertile pinnules terminated by a transversely linear-oblong re- 

 fleied lobe covering several roundish clusters, sterile lobes ser- 

 rate.— .B. 5. 1564. H.FAl. iV; 83.— Rhizome blackish, shaggy. 

 Fronds 6 — 12 in. high. Stipe and rachis slender, nearly black. 

 Pinnules not jointed to the partial stalks. — Damp rocks near 

 the sea in the south and west. P. V. — ^IX. E. I. 



Tribe V. Hymenophyllea. 



15. Teichom'anes Linn. 



1. T.radicans tjiw.); fronds 3 or 4 times pinnatifld glabrous, 

 segments uniform linear, involucres solitary in the axils of the 

 unper segments, receptacle at first included ultimately very pro- 

 minent.— .E. B. 1417. T. speciomm Willd., .V. 805.— Fronds 

 rather triangular, very much divided, 4 — 8 in. long, formed of 

 hard wiry branched ribs each with a rather membranous wing. 

 Khizome black, downy, very long. Involucres scarcely winged. 



