I
THOSE WHICH HAVE THE FRUITING PORTION IN GREENISH, BERRY-LIKE STRUCTURES AND NOT ON THE BACK OF FRONDS
A. FRUITING FRONDS WHOLLY FERTILE
(Fertile and sterile fronds entirely unlike)
1. Fruit in a one-sided spike in two ranks; plants very small; sterile fronds thread-like and tortuous.
Curly Grass. Schizæa.
2. Fruit in a club-shaped, brown or cinnamon-colored spike loaded with sporangia; fruit in early spring.
Cinnamon Fern. Osmunda cinnamomea.
3. Fruit in berry-like, greenish structures in a twice pinnate spike, which comes up much later than the broad and coarse pinnátifid sterile fronds.
Wet ground. Sensitive Fern. Onoclea.
4. Fruit in pod-like or necklace-like pinnæ; fertile frond pinnate; sterile frond tall, pinnátifid; fruit late.
Ostrich Fern. Onoclea struthiopteris.