Page:Parsons How to Know the Ferns 7th ed.djvu/71

 GROUP V

FERTILE AND STERILE FRONDS LEAF-LIKE AND SIMILAR; SPORANGIA IN LINEAR OR OBLONG FRUIT DOTS

Rather large, fronds 2-pinnate, fruit-dots curved, often horseshoe shaped, finally confluent. In moist woods and along roadsides. P. 120.

Large, fronds once-pinnate, pinnæ deeply pinnatifid, lobes oblong and obtuse, fruit-dots oblong, silvery when young. In rich woods. P. 124.

Very small, fronds loosely 2–3 pinnate at base, pinnatifid above, fruit-dots linear-oblong, confluent when mature. On limestone cliffs. Rare. P. 126.

Small, fronds 1–2 pinnate, fruit-dots linear-oblong, often confluent. On rocks. P. 130.

Fronds slender and erect, once-pinnate, pinnæ eared on the upper or on both sides, stalk and rachis blackish and shining, fruit-dots oblong. On rocks and hill-sides. P. 134.