678 FILICES. 



leaf difform, pinnatisect. — A glabrous Fern ; segments large : veins costale, connected by a 

 juxtamarginal arch. 



174. O. cervina, Kze. — Plum. Fil. t. 154: fertile segments too large. Hook. Greu. 

 Ic. t. 81.— Osmunda, L. Acrostichum, Sw. Polybotrya, Kaulf— \\ r -$ high •. sterile 

 segments rigid-chartaceous, 4-8-jugal, oblong-lanceolate, pointleted, or acuminate, oblique at 

 the base, entire, most 6"-9" long, 2" broad, fertile usually 3" long, secondary 3" long, 1 

 broad. — Hab. Jamaica !, Bancr., Pd., in woods ; Dominica !, Itnr., S. Vincent !, Guild. ; 

 Trinidad !, Pd., on rocks ; [Cuba ! and Mexico ! to South Brazil !]. 



33. LOMAGRAMME, J. Sm. 



Sori covering two broad, longitudinal bands on the under side of contracted leaf-seg- 

 ments or leaflets, leaving free a space along the midrib and the revolute margin, naked : 

 sterile leaf diflbrm. — Leaf pinnatisect, or pinnate : veins anastomosing. 



175. Ii. prsestantissima, Gr. Leaf pinnatisect, glabrous, chartaceous : segments 

 4-7-jugal, oblong-lanceolate, acumiuate, cuneate at the base, repand-entire, revolute at the 

 margin, superior shortly decurrent : veins in a simple network ; fertile segments long, linear : 

 free spaces along the midrib and margin narrow. — Neurocallis, F4e. — Inferior segments 1 

 long, 2"-lV broad, superior decrescent, fertile about 6" long, 5"'-4'" broad.— Hab. Domi- 

 nica !, Imr. ; [Guadeloupe]. 



34. ANETIUM, Splitg. 



Sori scattered on the network of veins and the meshes of the entire leaf, naked. — Leaves 

 conform : veins in a simple network : petiole jointed at the base; sori forming distinct dots, 

 or confluent. 



176. A. citrifolium, Splitg.— Plum. Fil. t. 116.— Acrostichum, L. Antrophyum, 

 Fee. — Rhizome creeping, densely paleaceous ; leaves scattered, chartaceous, lanceolate-ob- 

 long, or elliptical, pointed, l£'-5" long, 12£"-1" broad, tapering into a short petiole : mid- 

 rib disappearing above. — Hab. Jamaica !, Pd., Wils., on palm-trees ; S. Vincent !, Guild. ; 

 Trinidad!, Lockh. ,- [Portorico ! to French islands ! ; Guiana ! to Brazil !]. 



35. HEMIONITIS, L. 



Sori reticulated, continuous upon the whole loose network of veins, naked. — Leaf cordate, 

 entire, or palmatiftd. 



1 77- H. palmata, L. Leaves pilose, chiefly at the margin, fertile cordate-5-lobed, 

 much shorter than the slender petiole, sterile 3-5-lobed, shorter petioled : lobes ovate, obtusely 

 serrate, in the former produced into a deltoid point, in the latter blunt.— Plum. Fil. t. 151. 

 — Fertile leaf 4"-2" diam. : petiole 6"-8" long.— Hab. Jamaica!, Pd. ; Dominica !, Imr. ; 

 Trinidad !, Lockh., Cr., Sch. ; [Cuba ! to French islands ! ; Mexico ! to Peru !]. 



36. GYMNOGRAMME, Desv. 



Sori continuous, covering oblique, branched veins, at length often confluent, naked. — Leaf 

 mostly divided : veins free in our species, or nearly so. 



* Leaf-segments entire : petiole valid. 



178. G. rufa, Desv. Rusty-pilose; leaf pinnatisect: segments distant, nearly hori- 

 zontal, ovate-oblong, pointed, entire, shortly petiolulate : veins flabellate-2-3-forked (and 

 simple); sori dense, distinct. — SI. t. 45./. 1. Schk. Crypt, t. 21. sin.— Acrostichum, L. 

 Hemionitis, Sw — 1'-1V high ; segments at length deciduous from the persistent petiolule, 

 2"-l" long, 10"'-6"' broad.— Hab. Jamaica!, Hariw., Wils., in dry, hot plains; [Cuba! 

 and Guatemala ! to Brazil !]. 



179. O. trifoliata, Desv. Glabrous, paleaceous below ; leaf pinnatisect : segments 

 chartaceous, spreading-erect, shortly petiolulate, or superior sub3essile, Z-sect, or uppermost 

 undivided, special ones linear, acuminate, entire, tohite-powdery beneath : veins flabellate- 



