ASPLENIUM.—(1) A pinna of A. thelypteroides; and (2) part of a lobe in fruit, enlarged.

DICKSONIA.—(1) Pinna of D. pilosiuscula; (2) portion of a pinnule, enlarged; and (3) a fruit-dot in its cup shaped indusium.

EXPLANATION OF PLATE XIX.

CYSTOPTERIS.—(1) Piece of the frond of C. bulbifera; (2) a lobe in fruit, enlarged; and (3) a small portion more magnified, bearing a fruit-dot with its indusium thrown back.

WOODSIA.—(1) Small frond of W. glabella; (2) a part of a fruiting pinna of the same, magnified; and (3) a separate indusium, more magnified; (4) a piece of a fruitful pinnule of W. obtusa, enlarged; and (5) a fruit with the opened indusium beneath, more magnified.

ASPIDIUM.—(1) Pinna of A. (Dryopteris) marginale; and (2) a magnified fruiting portion; (3) piece of A. (Polystichum) acrostichoides; and (4) a small fruiting portion, magnified.

ONOCLEA.—Sterile and fertile frond of O. sensibilis; (1) front view of a fruiting contracted pinnule, enlarged; and (2) the same laid open and viewed from the other side; on one lobe the sporangia are removed from the veins.