126 Spinulose Fern 
to sessile, oblong-lanceolate, basal pair unequally deltoid-ovate: 
pinnules diverging from secondary rachis at angle of about sixty 
to usually a trifle less than ninety degrees, crowded or more 
distant, alternate or opposite, mostly short-stalked or subsessile, 
ovate-oblong, obtuse to acute, commonly subacute, pinnatifid or 
pinnately divided, usually minutely, obscurely, and very spar- 
ingly chaffy on under surface along midveins; the inferior mostly 
longest, in basal pinne moderately elongate with the basal one 
commonly shorter than the next: segments adnate-decurrent, 
oblong or at least the larger ovate, on sides and apex serrately 
toothed or lobed; teeth and lobes spinulose entire or spinulose- 
toothed: rachises channelled on face, furnished, especially at 
nodes of pinnz, sparingly with small or minute, linear or ovate, 
acuminate, entire scales, secondary rachises very narrowly 
winged: color commonly dark green: lower surface slightly 
paler than upper, minutely glandular: glands unicellular, capi- 
tate or cylindrical: texture firmly membranaceous. 
Venation pinnate, free, marked on face of blade by depressed 
lines: each tooth of blade occupied by a veinlet: primary branches 
of midveins of pinnules’ segments each, excepting sometimes the 
superior basal one, occupying a primary lobe or tooth of the seg- 
ment, in the entire one simple, in the toothed bearing simple 
branches equal in number to the teeth: veinlets clubbed at apex. 
Sori usually small, borne on primary branches, when these 
are simple, of midveins of pinnules’ segments; when these branches 
are compound, borne on their superior basal branches, dorsal or 
subapical, the fertile veinlet mostly projecting beyond radius of 
sorus: indusia whitish, delicately membranous, round-reniform, 
bearing stalked and sessile glands, denticulate at margin. 
Spores muriculate. 
