64 Narrow-Leaved Spleenwort 
pinnate: apex long-acuminate, undulate to crenate becoming 
parted below: pinnz approximate or distant, alternate or oppo- 
site, mostly very short-stalked or subsessile, at base truncate or 
wedge-shaped or rounded or, at least in sterile leaves, slightly 
cordate, linear-lanceolate, in sporophylls often somewhat falcate, 
acuminate; the basal reduced, often oblong-lanceolate or oblong- 
ovate or ovate and obtuse; the uppermost oblong-lanceolate or 
ovate-lanceolate, acute to obtuse, often passing into obtuse some- 
times orbicular segments; subentire to undulate or crenulate, 
rarely slightly and coarsely crenate and at base cut, abnormally, 
into lobes: margins obscurely hyaline, very minutely and ob- 
scurely serrulate: rachis furrowed on face, very narrowly winged 
above, greenish-stramineous to bright stramineous when dried: 
lower surface, sometimes both surfaces, bearing a few obscure, 
minute, chaffy hairs: color grass-green or darker: texture thin, 
herbaceous. 
Venation pinnate, free or with occasional areole: primary 
branches of pinne’s midveins mostly simple in apices of pinne; 
the basal usually the most complex, once to three times forked; 
those between mostly once to twice forked. 
Sori linear or oblong, or the smaller suboval; borne singly on 
primary branches, when these are simple of midveins of pinne 
and apex of blade, when they are compound extending along or 
wholly upon their superior basal branches, or when latterare 
compound sometimes extending along or in apex of blade wholly 
upon the veinlets next midveins, opening toward midveins: in- 
dusia arched, entire. 
Spores ovoid, covered with anastomosing ridges. 
Habitat. Rich soil in damp woods or ravines, sometimes 
near calcareous rock. Often with Dryopleris Goldieana. 
