52 
POLYPODIACEyT, — PTERIDK.T,. 
dimidiate, cmved, oblong-obtuse, membranous, tender green, with black bristle-like hairs on the upper surface, 
superior margin obtusely crenate. Sori punctiform, from four to six on each pinnule ; indusium hairy, reni- 
form. Rachis and stipes glabrous ; lateral, adherent to a slender creeping rhizome, forming dense tufts. 
18. A. CRISTATUM, Linnmus (A. striatum, A. villosum, 0 / some gardens). — A beautiful evergreen 
stove species, from Jamaica. Fronds glabrous, bipinnato, one foot long ; pinme linear-acuminate, narrow, six or 
eight inches long, pendulous ; pinnules small, dimidiate, rigid, obtuse, imbricate, deep green, and truncate at 
the base. Sori oblong, suboontiguous, one to four on the upper margin only. Stipes dull black, minutely 
niuricated; lateral, adherent to a short creeping scaly rhizome. This species is sometimes cultivated under the 
name oi A. villosmn. 
19. A. Capilrus-veneris, Linnceus (A. Moritzianum, Link). — A dwarf evergreen frame or greenhouse 
Fern, indigenous to Britain, common in the south of Europe, and occurring in the East Indies, Mauritius, China, 
North and South Africa, the Canaries, the temperate parts of North America and Central America, and the Cape 
de Verd Islands. Fronds glabrous, membranous, tender green, usually somewhat ovate, bi-tri-pinnate, six or 
eight inches high ; pinnules obovate-cuneate, inciso-sublobate, serrate at the margin. Sori oblong. Fronds 
lateral, adherent to a soal}r creeping rhizome. This species, although indigenous to Britain, is one of those 
delicate Ferns that cannot be cultivated in exposed places, for if planted in such situations it invariably 
dwindles away, and is soon lost. It grows freely in a close frame, or in a greenhouse where the atmosphere is 
kept moist. In the warmer climate of Madeira, and the tropics, it attains the height of eighteen inches, and in 
this state has been called A. Moritzianum ; but the native plant, if cultivated in a moist stove with a high 
temperature, will produce fronds of equal magnitude, and identical in structure. 
20. A. ASSiMiLE, Swartz. — A very neat and delicately beautiful evergreen greenhouse Fern, from New 
Holland and New Zealand. Fronds slender, glabrous, broadlj' lanceolate, tripinnate, a foot or more long ; pin- 
nules small, somewhat roundish or subrhomboidal, cuneate at the base, bright green, and slightly lobed or crenate 
at the margin. Sori small ; indusium reniform. Fronds lateral, adherent to a slender creeping rhizome. 
21. A. CUNEATUM, Lang sdorf and Fischer. — An evergreen stove Fern, from Brazil. Fronds glabrous, tri- 
angularly elongate, three or four times pinnate, a footer more high ; branches very slender, and of a light green ; 
pinnules small, numerous, oblong, wedge-shaped, inciso-sublobate, sterile lobes serrulate, fertile emarginate. Sori 
small ; indusium reniform. This species is one of the most delicately beautiful of the genus ; the fronds grow 
rather erect, and are adherent to a somewhat tufted rhizome. It is sometimes called A. pedidimmi. 
22. A. CONCINNUM, Ilmnholdt, Lonplnnd, and Lutntli. — A very graceful pendulous evergreen stove species, 
from the West Indies, Venezuela, and other parts of South and Central America. Fronds slender, glabrous, 
lanceolate, tripinnate, two to three feet long; pinnules somewhat round or rhomboidal, membranous, tender 
green, obtuse with crenateTobes, the lowest erect and appressed to the rachis. Sori small, numerous ; indusium 
reniform. Fronds lateral, adherent to a somewhat creeping rhizome. 
23. A. CHII.ENSE, Kaulfuss. — An elegant evergreen greenhouse Fern, from Chili, Valparaiso, and Juan 
Fernandez. Fronds ovate-deltoid, about one foot high, grass green, tripinnate; pinnules petiolulate, coriaceo- 
membranous, hairy beneath, subrhombeo-reniform, more or less obliquely cuneated, often truncated at the base, 
the' margin irregularly lobed, the lobes retuse, soriferous. Sori oblong- reniform, distant in the lobed pinnules, 
crowded in the more entire ones. Stipes and rachis ebeneous, glossy. Fronds lateral, adherent to a creeping 
rhizome. Recently introduced to Ivew from the Continent. 
24. A. FRAGILE, Su'ariz.—A remarkable stove Fern, native of Jamaica. Fronds one to two feet long, bright 
green, ovate-lanceolate, tri-quadri-pinnate ; pinnules thin, membranous, obovate wedge-shaped, petiolulate, 
rounded at the apex, serrated when sterile, three or four lobed when fertile, the fertile lobes retuse, and bearing 
a sorus in the sinus. Involucres oblong, straight. Stipes very short, and, as well as the rachis, ebeneous and 
glossy. Fronds adherent to a tufted rhizome. The pinnules in this species are remarkably deciduous, being all 
cast off while drying. 
25. A. TEA’^ERUM, Swartz. — A very elegant evergreen stove Fern, from the West Indies and Central America. 
Fronds glabrous, triangular, four times pinnate, two to two and a half feet high ; pinnules membranous, bright 
green, rhomboidal, obtuse at the apex, inciso-lobate ; sterile lobes serrulate, fertile entire. Sori oblong-reniform. 
Fronds lateral, adherent to a short creeping rhizome, forming dense tufts. 
26. A. CuNNiNGiiAJii, Hooker (A. affine, of gardens). — An ornamental evergreen greenhouse Fern, from 
New Zealand. Fronds glabrous, somewhat pentagonal, bi-tripinnate, twelve or fourteen inches high; pinnules 
dimidiate, oblong-obtuse, cuneate or truncate at the base, deep green, superior margin in ciso -serrate. Sori 
numerous; indusium reniform. Stipes scaly near the base, lateral, adherent to a scaly creeping rhizome nearly 
the size of a crow’s quill. 
27 . A. FORMOSUM, R. Brown. — An ornamental evergreen greenhouse Fern, from New Holland. Fronds 
deltoid or pentagonal, branching, four times pinnate, one and a half to two feet high ; pinnules small, membranous, 
rhomboidal, obtuse, inciso-lobate, pale green, the sterile serrate ; rachis pubescent. Sori small ; indusium reni- 
form. Stipes scabrous, lateral, adherent to a slender creeping rhizome. 
28. A. CULTRATUM, J. Smith. — A very handsome stove Fern, native of Brazil, Fronds one and a half to two 
feet or more high, glabrous, tripartitely bipinnato, that is, bipinnate with the lower pair of pinnae two-parted; 
pinnules dull green, somewhat cordately ihomboid-oblong, the upper side and more or less attenuated apex lobed 
