66 ENGLISH BOTANY. 



long to nearly as long as the lamina), rather stout, flattened or only 

 slightly channelled on the anterior face, even in the upper part 

 containing 5 vascular bundles, thickly sprinkled with minute sessile 

 glands, and rather thickly clothed with numerous lanceolate or ovate- 

 lanceolate acuminate denticulate brown conspicuously glandular 

 scales, which are subpersistent, or more rarely partially or wholly 

 persistent. Lamina firm, dull greyish-green, thickly sprinkled with 

 glands on both sides at least when young, strapshaped-oblong or 

 narrowly triangular-oblong, tapering gradually to the apex, very 

 abrupt at the base, bipinnate ; lowest pair of pinnae triangular or 

 triangular-strapshaped, about as long as any of the succeeding pairs, 

 all of them shortly stalked, pinnate, flat or slightly concave ; ultimate 

 pinnules oblong or oblong-strapshaped, or strapshaped-triangular, 

 scarcely falcate, not decurrent on either side of base, obtuse or sub- 

 acute, pinnatifidly lobed, with the lobes serrate, the serratures 

 generally very sharp but not spinous-pointed. Ultimate veins running 

 from the midrib to just within the margins of the lobes or ultimate 

 segments of the pinnules, with each venule running into a tooth. 

 Sori placed on the pinnce of the upper half or two-thirds of the frond, 

 attached to the back of the anterior venule of the ultimate lobes, 

 forming a line on each side of the main vein of the pinnules con- 

 siderably more approximate to it than to the margin of the pinnule, 

 extending nearly to the apex of the pinnules, sometimes at the base of 

 the pinnules, also on 2 or more branches of the vein. Indusium firm, 

 persistent, roundish-reniforrn, convex, often very much so, sprinkled 

 with conspicuous glands over the whole surface. Spores bluntly 

 tuberculate with a few large blunt tubercles. No sterile fronds 

 dissimilar to the fertile ones. 



On rocks and amongst broken limestone in mountainous districts, 

 very local. Silverdale, near the top lock, Lancaster and Kendal 

 Canal, North Lancashire ; Allermine rocks, above Settle ; south-east 

 side of Ingleborough ; White Scars, above Ingleton, Yorkshire; 

 Arnside Knot, Hutton Eoof Craigs, and Farlton Knot, Westmore- 

 land ; and indeed over the whole tract between Arnside Knot and 

 Ingleborough. It is recorded from Wolston Moss, near Warrington, 

 Mr. W. Christy, but this requires confirmation. A single plant 

 was found near Bath, probably planted ; and it has been gathered 

 in Ireland, on a clay slate wall near Towaly, Drogheda, no doubt 

 planted (Cyb. Hib.). 



England, [Ireland]. Perennial. Summer, Autumn. 



