FILICES. 675 



obliquely pointed.— Plum. Fil. t. 115.— Acrostichum, Sw. G. acuminata, Pa— Leaf 3' 4' 

 loug : segments 8"-10" long, 3", uppermost 5" broad, fertile 4"-3" long, 12"'-6'" broad.— 

 Hab. Jamaica !, Wils., Pd., Bancr., in moist woods, Manchester ! [Cuba ! to French 

 islands !]. 



28. CHRYS ODIUM, Fee. 



Sori covering the under side of the upper, flat segments of a pinnatisect leaf, naked : in- 

 ferior segments sterile, conform. — Stout Ferns; veins in a network, midrib almost excur- 

 rent. 



158. C. vulgare, Fee. Leaf coriaceous, glabrous : segments oblong- lanceolate, or oblong- 

 linear, blunt, or bluutish, cuneate at the base, entire: network of veins simple. — Plum. Fil. 

 t. 104. Schk. Crypt. t.\,l. b. — Acrostichum aureum, L.~ 8'-10' high : segments 6"-12" 

 long, l"-2" broad. — Hab. Jamaica !, Wils., in marshes and bogs : [all tropical countries 

 and a little beyond their borders to Florida, Natal, Hongkong]. 



29. RHIPIDOPTERIS, Schott. 



Sori covering the under side within the margin of a palmatinerved, roundish-emarginate 

 (or 3-lobed) leaf-blade, naked : sterile leaf dilfora, palmatipartite (rarely palmatinerved- 

 subentire). — All leaf-ribs dichotomous, free. 



159. R. peltata, Schott. Sterile leaf several times dichotomously palmatipartite: 

 segments linear, ultimate short, pointed, 1-nerved, veinless : petiole slender ; fertile blade 

 reniform : sterile margin crenulate. — Plum. Fil. t. 50. a. — Rhizome filiform, creeping; 

 leaves scattered, sterile about 1", fertile 4"'-3"' broad : petiole 2"-l" long.— Hab. Ja- 

 maica !, Pd., on trees and rocks, S. Georges ; Dominica !, Imr. ; [Cuba ! and Mexico ! to 

 Guiana ! and Peru !]. 



30. ACROSTICHUM, L. 



Sori covering the under side of a flat, entire, leaf-blade, naked : sterile leaf nearly con- 

 form. — Midrib in our species tapering, or disappearing at the summit: petiole mostly 

 jointed at the base. 



* Veins in a simple, narrow network (Hymenodium, Fee). 



160. A. crinitum, L. Leaf elliptical, blunt, or bluntish, quite entire, long-petioled, 

 chartaceous, blackish- ciliate and -pilose : bristles long, dilated at the blade, crowded along 

 the petiole and margin, scattered on the surface : veins in a simple network ; fertile blade 

 conform, but smaller.— Plum. Fil. t. 125. Hook. Grev. Ic. t. 1.— Blade 15"-3", petiole 

 l2"-3" long. — Hab. Jamaica!, Pd., on rocks, in shady woods, S. Georges; Dominica!, 

 Imr., S. Vincent !, Guild. ; [Cuba ! to French islands !, on trees]. 



** Veins simple, or forked, nearly parallel, free, rarely connected by a single marginal 



arch (Elaphoglossum, Schott). 



+ Leaf ciliate with rusty bristles. 



161. A. -711108111X1, Sw. Leaf lanceolate-oblong, with a bluntish point, undulate-re- 

 pand, or subentire, petioled, chartaceous, rusty-ciliate and -pilose : bristles dilated at the 

 base, crowded along the thin margin, scattered on the surface : veins simple and forked, 

 free-excurrent; fertile blade lanceolate, pointed.— Plum. Fil. t. 127, med. inf. Hook. Grev. 

 Ic. t. 95.— A. undulatum, Kaulf. {ex Sieb. Mart. 346). A. Moritziauum, Eat. PI. Wr. 

 1046: non JR.).— Sterile blade 8"-4" long, U"-l" broad, fertile 3"-2" long, 8'" broad : 

 petiole 4"-2"(-10") long, rusty with crowded (or scattered) bristles.— Hab. Jamaica!, Pd., 

 Bancr. ; Dominica !, Imr. ; [Cuba ! to French islands !, Venezuela !, Ecuador !]. 



162. A apodnm, Kaulf. Leaf lanceolate, shortly acuminate, with a bluntish point, 

 repand or quite entire, long- tapering into the subsessile base, chartaceous, rusty-cihate and 

 pilose, or glabrescent : veins forked, or simple, excurrent into the thickish margin ; fertile 

 blade linear-lanceolate, pointed.— Hook. Grev. Ic. t. 99.— Sterile leaf H'-8 long, \\ -1 

 broad, fertile shorter, 5"'-6'" broad.— Hab. Jamaica !, Macf, Pd., iu woods near Bath ; 

 Montserrat, S. Vincent !, Guild. ; [Cuba !, to equat. Brazil !]. 



