6. INTERRUPTED FERN
Osmunda Claytoniana
Large. Sterile fronds once-pinnate, pinnæ pinnatifid. Fertile fronds leaf-like above and below, contracted in the middle with brown fruit-clusters. In wet places. P. [72].
7. CLIMBING FERN
Lygodium palmatum
Climbing, with lobed, palmate pinnæ and terminal fruit-clusters. Moist thickets and open woods. Rare. P. [75].