POLYSTICHUM. 41l 
E. spmosa N. 209.—Fronds nearly erect; the lowest pinnz 
equalling those that follow. Sori mostly in 2 rows.—Marshy 
places and wet woods. P. VIII. IX. 
6. L. rigida (Presl); fronds triangular-lanceolate bipinnate 
glandular, pmnules oblong blunt lobed and serrate, segments 
2—5-toothed not spinulose, lateral nerves 3-fid, indusium per- 
sistent fringed, stipes clothed with long pointed concolorous 
seales.— Aspidium Hook., E. B. 8. 2724. N. 191.—Fronds 
erect, lanceolate with the lower pinne rather short and trian- 
gular; or triangular with the lower pinne elongated; upper 
pinne narrow; all pimnate. Pinnules truncate below with a 
narrow attachment. Stipes short, scaly. Covered with minute 
stalked glands. Height 1—2 feet.—Ingleborough, Arnside Knot, 
and near Settle. P. VII. VITI. E. 
7. L. dilatata (Presl); frond ovate-lanceolate bipinnate, pin- 
nules pinnate or pinnatifid, segments acutely serrate spinose-mu- 
cronate, indusium with marginal stalked glands, stipes clothed 
with long pointed scales with a dark centre and diaphanous mar- 
gin.— Aspidium Sm., L. multiflora N. 215.—Fronds arched, often 
drooping, convex ; the lowest pinnz shorter than the following. 
Fronds of young or starved plants often triangular, of older and 
perfect ones never. Sori scattered. The largest scales of the 
full grown plant should be examined.—f. L. collina (Newm.) ; 
frond lanceolate, pinnules ovate blunt bluntly mucronate-serrate. 
N. 223.—Woods, banks, &c. 8. Westmoreland. P. VIII. IX. 
8. L. Fenisectt (Wats.); frond triangular bipmnate, pnules 
pinnate or pinnatifid, segments serrate spmose-mucronate, indu- 
sium jagged at the edge, stipes clothed with long narrow lacini- 
ated concolorous scales.—Nephrodium Feenisecii Lowe! L. re- 
curva N. 225.—Frond elongate-triangular concave above; the 
lower pinnz much the largest. A smaller plant than the two 
preceding. Sweet-scented.—Damp places. P. VII. IX. 
5. Porysticaoum Roth. 
1..P. Lonchitis (Roth); fronds rigid lmear simply pinnate, 
inne not lobed serrate spinous their base auricled above oblique 
below.—N. 163. Aspidium Sm., E. B. 797. Stipes very short. 
Fronds narrow very rigid and leathery. Pinnz ee and 
twisted (most in the Irish, much less so in the Welsh plant), 
lower ones usually auricled both above and below.—Young and 
simple pinnate fronds of the next species are often distinguished 
from this with difficulty.—Alpine rocks. P. VII. 
2. P. aculeatum (Roth); fronds rigid linear or lanceolate bi- 
pinnate, pinnules obliquely decurrent acute.—N. 169. A. lobatum 
Kunze. A. aculeatum and A. lobatum Sm.—Stipes il short. 
T 
