Page:Parsons How to Know the Ferns 7th ed.djvu/73



Fronds a few inches to nearly two feet long, undivided, oblong-lanceolate, heart-shaped at base, fruit-dots linear, elongated. Growing among the fragments of limestone cliffs. Very rare. P. 150.

Large, fronds once-pinnate, pinnæ pinnatifid, fruit-dots oblong, in chain-like rows parallel and near to the midrib, confluent when ripe. In swamps. P. 156.

GROUP VI

FERTILE AND STERILE FRONDS LEAF-LIKE AND USUALLY SIMILAR, FRUIT-DOTS ROUND

Usually rather tall, fronds once-pinnate, with deeply pinnatifid pinnæ, tapering both ways from the middle, margins of fertile fronds not revolute. In woods and open meadows. P. 159.

Usually rather tall, fronds once-pinnate, with pinnæ deeply pinnatifid, scarcely narrower at the base than at the middle, veins forked, fertile fronds noticeable from their strongly revolute margins. In wet woods and open swamps. P. 160.

Close to preceding species, rather tall, fronds once-pinnate, with pinnatifid pinnæ little or not at all narrowed at base, veins not forked, margin of fertile frond slightly revolute. In wooded swamps. P. 164.