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