696 FILICES. 



?iDus, and one of tlie auricles deeurrent at the receptacle. — 81. t. 26. /. 1. HooTc. Grev. 

 Ic. t. 96. Hook. Gen. t. 5S. B. — Asplenium proliferum, Sim. (Aspidium, Book., Grev., 

 non M. Br. ; Padyenia, Koolc). — Csespitose ; sterile leaTes l"-6" long, often proliferous at 

 the apex, fertile . 6"-8" Iqng, 3"'-6"' broad. — Hab. Jamaica (i?oo*.), in shady mountain- 

 woods; [Cuba!]. 



§4. Veins costate : leaf entire {Cont Polt/podiumUeclmoides,S^.: leaf pinnatrsect). 



277. -A. plantagineiim, Gr. Leaf elliptieal-oMong , blunt, cuneate-deeurrent at the 

 base, entire or sinnate-repand : costate veins distant, veinlets in a loose netvjork with free 

 appendages ; sori serial along the veins, distant : indusium peltate-orbicular, deciduous or 

 "suppressed."' — Plum. Til. t. 128. — Polypodium, Jacg, — About-!' high, 4"-2i" broad. — 

 Hab. Dominica !, Imr., S. Vincent !, Guild. ; [French islands !, Sieb. Mixt. 333 ; Panama, 

 Venezuela!, Guiana!, eciuat. Brazil, Peru !]. 



278. A. nodosum, W. Leaf shining-cJiartaceous, lanceolate-ohlong or ohlong-linear, 

 pointleted, entire, cuneate at the petioled base : all veins costate, approximate, simple, and 

 2-partite, no veinlets: petiole jointed below the middle ; sori serial along the midrib, and 

 scattered on the back of the veins : indusium cordate-orbicular. — Plum. Fit. t. 136.r — 

 Oleandra, Br. 0. micans, Eze. {PI. Lechl. 2539). A. articulatum, Siihh. —'&"-}.%" high, 

 2i"-l" broad. — Hab. Jamaica !, Pd., on decayed trees ; Dominica !, Imr., S. Vincent !, 

 Guild. ; Trinidad I, Pd. ; [Cuba ! to French islands ! ; Guiana to Peru ! ; Fernando Po], 



41. CYSTOPTERIS, Bemh. 



ySfari round, dorsal: indusium inferior, dimidiate-eucnllate, pointed. - 

 /. 279. C. tragilis, Bernh. leaf 2-pinnatisect: its outline oblong-lanceolate : secondary 

 segments pinuatipartite, tertiary dentate-lobed : rhachis margined.— C. janiaiceusis, Besv. 

 ■ — Hab. Jamaica {Hook.) ; [most countries of the globe], 



42. POLYPODIUM, i. 



Sori round (rarely oval), naked, on (rarely below) the summit of free, or at the anasto- 

 mosis of connected veinlets, rarely lateral from the reduction of its proper veinlets, or dorsal : 

 veinlets thickened at the summit, or slender beyond dorsal sori, 



Sect. 1. Phbgoptjskis, Metten. (conf. Aspidium). Sori dorsal on slender veinlets. — Leaf 

 often much divided : )ietiole not jointed at the base, 



* Leaf pinnatisect with, pmnatipartite segments : veins free, lowest veinlets distant 



at the sinus, 



280. P. caudatum, Kaulf. Leaf pinnatisect, glabrous, dotted with pellucid points, 

 often paleaceons, at the ribs beneath ; prima.ry j«yw««fe pinuatipartite, superior sessile, j«- 

 condary linear-oblong, bluntish, senate : veinlets simple or forked : rhachis glabrous, bear- 

 ing scattered scales ; sori serial, nearly equidistant from tbe midrib and margin. — 3'-4' 

 high ; secondary segments 6"'-8"' long, 2'" broad. — Hab. Jamaica !, Maof., Pd., Wils. ; 

 [Cuba ! to Brazil !]. 



281. P. decussatum, L. Stout ; leaf pinnatisect, usually puberulous : primary seg- 

 ments horizontal, pinuatipartite, sessile, supported by an oblong, pointed scale, secondary 

 linear-oblong, blunt, entire, approximate, much diverging, lowest equal: veinlets simple ex- 

 current : rhachis puberulous or glabreseent ; sori serial, confluent. — Plum. Ml. t. 24. — 5- 

 12' high ; larger segments 1' long, 1" broad, secondary li'" broad.— Hab, Jamaica !, Wils., 

 Pd., in moist mountain-woods, at 3000' alt., rare ; Slontserrat, S.Vincent !, Guild.; [French 

 islands !, Siei. Mart. 349 ; Venezuela !'to Brazil and Peru !]. 



282. P. SSewardii, Gr. Leaf pinnatisect, glabreseent ; primary segments pinnati- 

 .partite, sessile, lower much decrescent, distant, secondary oblong, blunt, entire : veinlets 

 simple : rhachis puberulous or glabreseent ; sori shortly oblong, nearly equidistant from the 

 midrib and margin. — Grammitis, Moore. Gymnogramme gracilis. Heward (Leptogramma, 

 J. Sm.).—BY the sori shortly deeurrent along the veins it forms a passage -into Gymno- 



