=A. pedatum= (pedate).* _sti._ 9in. to 24in. long, erect, polished. _fronds_ dichotomous, with the main divisions flabellately branched; central pinnæ 6in. to 12in. long, 1in. to 1-1/2in. broad; pinnules 1/2in. to 3/4in. long, 1/4in. deep, dimidiate, broadest on the side nearest the stem, the upper and outer margin lobed, shortly stalked. _sori_ roundish, one to two lines broad. North Hindostan, the United States, &c. Hardy species. See Fig. 30.
=A. peruvianum= (Peruvian).* _sti._ 9in. to 18in. long, strong, erect. _fronds_ simply pinnate, or with one to three branches at the base, some of the latter sometimes again slightly divided; pinnules 2in. or more broad, 1-1/2in. deep, unequally ovate, cuneate at base, finely toothed and lobed round the upper and outer edge. _sori_ in interrupted patches round the sides of the pinnules. Peru. This is one of the finest of the large growing, evergreen stove kinds.
=A. polyphyllum= (many-leaved).* _sti._ 12in. to 18in. long, strong, erect. _fronds_ 2ft. to 3ft. long, 12in. to 18in. broad, the upper part simply pinnate; lower pinnæ sometimes 1ft. long; 6in. broad, with a long terminal and numerous lateral pinnules; segments 3/4in. to 1in. long, 1/4in. deep, dimidiate, with nearly parallel edges, the point obtuse, the upper edge sharply toothed. _sori_ in numerous sub-orbicular patches, placed in hollows in lobes along the upper edge. Columbia. A magnificent stove species. SYNS. _A. cardiochlæna_ and _A. macrocladum_.
=A. populifolium= (poplar-leaved). A synonym of _A. Seemanni_.
=A. princeps= (princely).* _sti._ 9in. to 12in. long, stout, nearly erect. _fronds_ large, 12in. to 24in. long, 9in. to 18in. across the base, deltoid, pendent, quadripinnate, pale greyish; lower pinnæ obliquely elongate, triangular, the posterior side tripinnate, the anterior bipinnate; upper ones pinnate, with a large cuneately flabellate terminal pinnule, apex of fronds pinnate; pinnules 1in. long, 3/4in. broad, roundish rhomboidal or shortly trapeziform, shortly stalked; basal margin entire, slightly concave, the anterior margins and apex lobate, the lobes serrulate in the sterile parts, and, where fertile, bearing each a concave sorus, so that the lobes appear two-horned. New Grenada, 1875. A magnificent stove species.