74 ENGLISH BOTANY. 



of the lamina where they are narrowly triangular, after which they 

 gradually diminish in length to the apex ; all of them shortly stalked, 

 pinnate ; pinnules flat, elliptical-oblong, or those next the rachis 

 oblong-triangular, attached by only a portion of their base, decurrent 

 on the lower side ; the lowest pair on each pinna quite separated and 

 almost stalked, deeply pinnatifid or pinnatipartite with the lobes 

 inciso-serrate ; the pinnules towards the apex of the pinnae less 

 deeply pinnatifid, and those towards the apex simply inciso-serrate ; 

 teeth incurved, acute, most of them mucronate. Ultimate veins deeply 

 impressed on the upper surface, running from the midrib of the 

 segments of the pinnules to their margins, clavate, all except the 

 anterior one (which runs into the notch between the teeth), running 

 into the teeth. Sori usually occupying the whole frond, attached to 

 the back of the anterior branch of the ultimate veins, forming a line 

 on each side of the ultimate segment of the pinnule in the lower 

 pinnules, and of the pinnule or segment itself towards the apex of 

 the pinnae, about midway between the mid-vein and the margin of 

 the segment or pinnule, as the case may be, and extending nearly to 

 the apex. Indusium thin, soon shrivelling, subpersistent, roundish - 

 reniform, flat, slightly erose, but without glands either on the margin 

 or surface. Spores abortive in all the specimens I have examined. 

 Barren fronds numerous, arching backwards, much shorter than the 

 fertile ones, and with a short, slender stipes. Lamina oblong, 

 tapering gradually from the middle of the frond to the apex, thinner 

 in texture than those of the fertile fronds, pinnate ; pinnae approxi- 

 mate, pinnatipartite ; ultimate segments oblong, closely approximate, 

 obtuse at the apex, doubly serrate, with the teeth incurved, short and 

 scarcely mucronate. 



In bogs, growing in company with L. cristata and L. spinulosa, 

 very local. Bawsey Heath, Norfolk ; Wybunbury bogs, Cheshire ; 

 Oxton bogs, Nottingham (Newman) ; Malton, Yorkshire (Monk- 

 man). Reported from Epping Forest, Essex ; Castle Howard, York- 

 shire, and Derwentwater, where L. cristata does not grow, but I 

 doubt it being the true plant. 



England. Perennial. Autumn. 



Rootstock in the cultivated plant breaking into numerous crowns, 

 which remain closely packed together ; they attain a larger size than 

 those of L. cristata before they break, having often 6 or 8 fronds 

 growing from a single one. No botanist seems to have published 



