SCHIZÆA.—Plant of S. pusilla, of the natural size; (1) a fertile pinna with eleven sporangia, magnified, and (2) a separate sporangium, more magnified.
LYGODIUM.—(1) Summit of frond of L. palmatum, with fertile and sterile divisions; (2) a fruiting lobe enlarged, with two of the lower scales, or indusia, removed, displaying a sporangium under each; and (3) a sporangium more magnified.
OSMUNDA.—(1) Small piece of the frond of O. Claytoniana, with a fertile and a sterile pinna; (2) a portion of the fruit magnified; and (3) one sporangium more magnified.
BOTRYCHIUM.—Plant of B. ternatum, and (1) a portion of the fruit, with six sporangia, magnified.
OPHIOGLOSSUM.—Frond of O. vulgatum, and (1) a portion of the fruiting spike enlarged.
