PTERIS.—A pinnule of P. aquilina, and (2) a piece of one of the lobes, enlarged, the marginal indusium rolled back on one side, displaying the fruit; the sporangia all removed from the lower part to show the receptacle that bears them, viz. a cross-line connecting the tips of the veins.
ADIANTUM.—(1) Piece of the frond of A. pedatum; (2) a pinnule somewhat enlarged; and (3) a piece of one more enlarged, with the indusium of one fruit dot turned back to show the attachment of the fruit.
CHEILANTHES.—(1) Small plant of C. vestita; and (2) a fruit-bearing pinnule, enlarged.
WOODWARDIA.—(1) Portion of the sterile and (2) of the fertile frond of W. augustifolia; (3) a piece of the latter, enlarged; (4) piece of the frond of W. Virginica; and (5) part of a fruiting lobe, enlarged.
CAMPTOSORUS.—Plant of C. rhizophyllus, and (1) a portion of a frond, with fruit dots, enlarged.
SCOLOPENDRIUM.—Tip of a fertile frond of S. vulgare, and (2) a piece enlarged, with two fruit-dots.