Asplenium Adiantum-Nigrum, Linn . 
BLACK SPLEENWORT. 
Root — Radicles long, black, and wiry; candex tufted. 
Frond — Elongate-deltoid, bipinnate. 
Stipes —As long as the frond, of a dark purple bue, 
PiNNiE — Triangular, alternate, pinnate ; apex often acute. 
Pinnules — Triangular, pinnatifid, bluntly or sbarply 
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 comiuenb. 
Habitat — In fissures of rocks and on walls, and on 
well-drained rocky slopes and banks. 
Locality — Plentiful about Matlock, Buxton, and other 
places. 
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