SCOLOPENDRIUM, PTERIS. 427 



the fronds very narrow, narrowing gradually downwards, with 

 1 or 2 short bifid lateral teeth, and bifid at the end. Dry clefts 

 of rocks, rare. P. VI. X. E. S. 



10. SCOLOPENDRIUM Sm. Hart's- tongue. 



1. S. vulgare (Sym.); frond oblong strapshaped smooth sim- 

 ple with a cordate base, stipes shaggy. E. B. 1150. Phyllitis 

 N. 289. Fronds 1 2 feet long, acute, often crisped and mul- 

 tifid. Damp shady places. P. VII. VIII. 



11. CETERACH Willd. 



1. C. Ojficinarum (Willd.) ; fronds pinnatifid covered beneath 

 with dense scales, pinnae alternate or opposite obtuse sessile. 

 Notolepum N. 293. Scolopendrium Sm., E. B. 1244. Fronds 

 3 6 in. long, green and smooth above, wholly covered by very 

 many scales beneath, amongst which the thecae are almost hidden. 

 Old walls and rocks. P. IV. X. 



12. GYMNOGRAMMA Desv. 



[1. G. leptopkylla (Desv.); fronds pinnate or bipinnate gla- 

 brous, pinnules wedgeshaped deeply lobed. IV. ed. 3. 11. S. 48. 

 Frond 1 4 in. high. Stipes purple. Pinnae and pinnules 

 alternate. Banks. Jersey. A. IV.] 



Tribe IV. Adiantea. 



13. BLECHNUM Linn. Hard-fern. 



1. B. boreale (Sw.)j barren fronds pectinate-pinnatifid with 

 broadly-linear rather obtuse pinnae, fertile frond pinnate with 

 linear acute pinnae. E. B. 1 159. Lomaria Spicant N. 89. Each 

 lateral vein of the fertile pinnae extends half-way to the edge, then 

 turns at right angles and proceeds up the pinna until it reaches 

 the next vein. Capsules attached in a continuous row to the 

 longitudinal portions of the combined lateral veins. Rather a 

 Blechnum than Lomaria. Stony and heathy places. P. VII. 



14. PTERIS Linn. Brakes. 



1. P.aquilina(\j.}', fronds tripartite, branches bipinnate, pin- 

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

 ments oblong obtuse. E. B. 1679. N. 93. Eupteris Newm. 

 Fronds annual, 1 5 feet high, very much divided, with spread- 

 ing branches. Capsules attached to the marginal vein, lying 



