SCOLOPENDRIUM,—PTERIS. 415 
dusium entire at the edge.—N. 265. A. alternifolium Sm., E. B. 
2258.—Fronds 3—4 in. long.—Rocks, very rare. P. VI—IX.—8. 
8. A. septentrionale (Hull); fronds 2- or 3-cleft, segments 
elongate-lanceolate bifid —E. B. 1017. N.269.—Segments of 
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. VIL—X. E. 8. 
9. ScoLOPENDRIUM Sm. 
1. S. vulgare (Sym.); frond oblong strapshaped smooth sim- 
ple with a cordate base, stipes shaggy.—E. B. 1150. Phyllitis 
Scolopendrium N. 289.—Fronds 1—2 feet long, acute, often 
crisped and occasionally the end is multifid—Damp and shady 
places. P. VII. VIII. Hart’s-tongue. 
10. Cereracu Willd. 
1. C. Officinarum (Willd.); fronds pinnatifid covered beneath 
with dense scales, pinne alternate or opposite obtuse sessile.— 
Notolepum Ceterach N. 293. Scolopendrium Ceterach Sm., E. B. 
1244.—Fronds 3—6 in. long, green and smooth above, wholly 
covered by very numerous scales beneath, amongst which the 
thecze are almost hidden.—Old walls and rocks. P. IV.—X. 
Tribe IV. Adiantee. 
11. BLecunum Linn. 
1. B. boreale (Sw.); barren fronds pectinate-pinnatifid with 
broadly-linear rather obtuse pinne, fertile frond pinnate, pinnx 
linear acute.—E. B. 1159. Lomaria Spicant N. 89.—Each lateral 
nerve of the fertile pinnez extending half-way to the margin and 
then turning at right angles and proceeding up the pinna until 
it reaches the next nerve. hece attached in a continuous row 
to the longitudinal portions of the combined lateral nerves. Rather 
a Blechnum than Lomaria.—Stony and heathy places. P. VII. 
12. Preris Linn. 
1. P. aquilina (L.); fronds tripartite, branches bipinnate, pin- 
nules linear-lanceolate the lower ones usually pinnatifid, seg- 
ments oblong obtuse.—E. B. 1679. N.93. Eupteris Newm. 
(Phytol. ui. 278).—Fronds annual, 1—5 feet high, very much 
divided with spreading branches. Thece attached to the margi- 
nal vein, lying upon a fine membrane and covered by the mem- 
branous continuation of the epidermis. Inferior pinnules pinna- 
tifid or sinuate or entire.—Woods and heaths. P. VII. Brakes 
or Brachen. 
