64 Narrow-Leaved Spleenwort 



pinnate: apex long-acuminate, undulate to crenate becoming 

 parted below: pinnae 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 imdulate 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 areolae: primary 

 branches of pinnae's midveins mostly simple in apices of pinnae; 

 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 pinnae 

 and apex of blade, when they are compound extending along or 

 wholly upon their superior basal branches, or when latter are 

 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. 



