678 riLICES. ♦ 



leaf difform, pinnatisecl.— A glabrous Fern ; segments large : veins coslaie, connected hy a 

 juxtamarginal arch, 



174. O. cervina, Kze.—Plum. Fil. «. 154: fertile segments too large. Hooh. Grey. 

 Jc. t. 81.— Osmnnda, i. Acrostichum, Sw. Polybotrya, Kaulf.~ll/-3' high : sterile 

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



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

 broad. — Hab. Jamaica!, Bancr., Pd., in woods; Dominical, Imr., S. Vincent!, Guild.; 

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



33. LOMAGKAMME, 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 difform. — LeiS pinnatisecl, or pinnate : veins anastomosing. 



175. Ij. prcestantissima, Gr. Leaf pinnatisect, glabrous, chartaceous : segments 

 4-7-jugal, oblong-lanceolate, acumiuate, cuueate 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, Fie. — Inferior segments 1' 

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

 nica !, Imr. ; [Guadeloupe]. ' 



34. ANETIUM, SpUtg. 



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. Antrophynm, 

 F4e. — Rhizome creeping, densely paleaceous ; leaves scattered, chartaceous, lanceolate-ob- 

 long, or elliptical, pointed, ]-J'-5" long, 12V-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 palmatifid. 



/ 177. H. palmata, i. Leaves pilose, chiefly at the margin, fertile cordate-5-lo6ed, 

 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 !, /mr. ; 

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



36. GYMNOGKAMME, Bess. 



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. Musty-pilose; leaf pinnatisect: segments distant, nearly hori- 

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

 simple); sori dense, distinct. — 5/. t. 45./. 1. Schk. Crypt, t. 21. «m.— Acrostjehum, Z. 

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

 2"-l"long, 1 0"'-6"' broad.— Hab. Jamaica I, Martw., Wils., in dry, hot plains; [Cuba! 

 and Guatemala ! to Brazil !]. 



179. <3. trifoliata, i)ej!). Glabrous, paleaceous below; leaf pinnatisect: segments 

 (, fchartaceous, spreading-erect, shortly petiolulate, or superior subsessile, Z-sept, or uppermost 



undivided, special ones linear, acuminate, entire, white-powdery beneath : yeias flabellate- 



