=A. Neitnerii.= Synonymous with _A. quercifolium_.
=A. nicotianæfolium= (tobacco-leaved).* _rhiz._ woody, wide creeping, scaly. _sti._ 1-1/2ft. to 2ft., scaly below. _barren fronds_ 1ft. to 3ft. long, 1ft. or more broad, with a large terminal pinna, and one to three lateral pairs, which are 6in. to 9in. long, 1in. to 3in. broad, acuminate, entire, or nearly so, the base slightly rounded, fertile pinnæ distant, 3in. to 4in. long, 3/4in. broad. Cuba, &c. Stove species. SYN. _Gymnopteris nicotianæfolium_.
=A. osmundaceum= (osmunda-like).* _rhiz._ woody, wide scandent, scaly. _sti._ 12in. to 18in. long, firm, erect, scaly at the base. _barren fronds_ ample, bi- or tripinnate; the lower pinnæ 1ft. to 2ft. long, 4in. to 8in. broad; pinnules stalked, lanceolate, with closely set sub-entire segments, of a light green colour; both surfaces naked. _fertile fronds_ nearly or quite as large as the barren ones; segments linear cylindrical, 1/4in. to 1/2in. long. Tropical America. Stove species. SYNS. _A. cylindricum_, and _Polybotrya osmundaceum_.
=A. paleaceum= (chaffy). Synonymous with _A. squamosum_.
[Illustration: FIG. 22. ACROSTICHUM PELTATUM.]
=A. peltatum= (peltate-leaved).* _rhiz._ slender, wide creeping. _sti._ distant, slender, 1in. to 4in. long, scaly throughout. _barren fronds_ 1in. to 2in. each way, repeatedly dichotomously forked, with narrow linear ultimate divisions, quarter to half line broad. _fertile fronds_ 1/2in. broad, often two-lobed. West Indies. Stove or greenhouse species. This elegant little fern requires a liberal supply of water all the year round, and is best grown in a well drained pan of good fibrous peat, leaf soil, and sand, with some nodules of sandstone raised above the rim of the pan; do not disturb it more than is necessary. SYN. _Rhipidopteris peltata_. See Fig. 22.
=A. petiolosum= (petioled). _rhiz._ woody, wide scandent. _sti._ woody, erect, scaly at the base. _fronds_ bipinnate, or tripinnatifid, 2ft. to 4ft. long, 1ft. to 3ft. broad, deltoid; the upper barren pinnæ lanceolate, pinnatifid, the longest sometimes 18in. long, and 6in. to 10in. broad; pinnules with long falcate lobes reaching half-way down to the midrib, both surfaces naked; fertile pinnules very narrow, and dangling, continuous or beaded. West Indies, Mexico, &c. Stove species. SYNS. _Polybotrya_ and _A. caudatum_.