Asplenium Adiantum-Nigrum, Linn . 
BLACK SPLEENWORT. 
Root — Radicles long, black, and wiry ; caudex tufted. 
Frond — Elongate-deltoid, bipinnate. 
Stipes — As long as the frond, of a dark purple hue. 
Pinnae — Triangular, alternate, pinnate ; apex acute. 
Pinnules — Triangular, pinnatifid, bluntly or sharply 
serrated ; those in the lower pinnae sometimes pinnate. 
Venation — Lateral veins alternate, branched. 
Fructification — Lines of capsules on the forked veins, 
which, after the bursting of the involucre, become confluent. 
Habitat — In fissures of rocks and on walls, and on 
well-drained rocky slopes and banks. 
Locality — Plentiful about Matlock, Buxton, and other 
places. 
14 
