Page:Parsons How to Know the Ferns 7th ed.djvu/66



the purpose of identification the ferns described are arranged in six groups, according to their manner of fruiting.

GROUP I

STERILE AND FERTILE FRONDS TOTALLY UNLIKE; FERTILE FRONDS NOT LEAF-LIKE IN APPEARANCE

1. SENSITIVE FERN

Onoclea sensibilis

Sterile fronds usually large; broadly triangular, deeply pinnatifid. Fertile fronds much contracted, with berry-like pinnules. In wet meadows. P. 54.

2. OSTRICH FERN

Onoclea Struthiopteris

Large. Sterile fronds once-pinnate, pinnæ pinnatifid. Fertile fronds contracted, with necklace-like pinnæ. Along streams and in moist woods. P. 56.

3. CINNAMON FERN

Osmunda cinnamomea

Large. Sterile fronds once-pinnate, pinnæ pinnatifid. Fertile fronds composed of cinnamon-brown fruit-clusters. In wet places. P. 60.

4. CURLY GRASS

Schizæa pusilla

Very small. Sterile fronds linear, grass-like. Fertile fronds taller, with a terminal fruit-cluster. In pine barrens of New Jersey. P. 63.