696 FILICES. 



sinus, and one of the auricles deciirrent at the receptacle. — SI. t. 26. f. 1. Hook. Gtrev. 

 Ic. t. 96. Hook. Gen. t. 53. B. — Aspleuium proliferum, Sw. (Aspidium, Hook., Grev., 

 non R. Br. ; Fadyenia, Rook.) . — Ca:spitose ; sterile leaves 1 "-6" long, often proliferous at 

 the apex, fertile 6"-8" long, 2"'-6'" broad. — Hab. Jamaica (Hook.), in shady mountain- 

 woods; [Cuba!]. 



$4. Veins costate : leaf entire (Conf. Polypodium blechnoides, Sw. : leaf pin natisect). 



277- A. plantagixteum, Gr. Leaf elliptical-oblong, Hunt, cuneate-decurrent at the 

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

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

 "suppressed." — Plum. Fit. t. 128. — Polypodium, Jacq.— About 1' high, 4"-2£" broad.— 

 Hab. Dominica !, Imr., S. Vincent !, Guild. ; [French islands \, Sieb. Mixt. 353 ; Panama, 

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



278. A. nodosum, W. Leaf shining-chartaceous, lanceolate-oblong or oblong-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. Fil. t. 136. — 

 Oleandra, Pr. O. micans, Kze. {PI. Lechl. 2539). A. articulatum, Schk — 8"-12" high, 

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

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



41. CYSTOPTERIS, Bernh. 



Sori round, dorsal: indusium inferior, dimidiate-eueullate, pointed. 



279. C. fvagilis, Bernh. Leaf 2-pinnatisect : its outline oblong-lanceolate : secondary 

 segments pinnatipartite, tertiary dentate-lobed : rhachis margined. — C. jamaicensis, Dew. 

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



42. POLYPODIUM, L. 



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

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

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



Sect. 1. Phegopteris, Metten. (conf. Aspidium). Son dorsal on slender veinlets. — Leaf 

 often much divided : ]>etiole not jointed at the base. 



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



at the sinus. 



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

 often paleaceous at the ribs beneath ; primary segments pinnatipartite, superior sessile, se- 

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

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

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

 [Cuba ! to Brazil !]. 



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

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

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

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

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

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

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



282. P. Hewardii, Gr. Leaf pinnatisect, glabrescent : primary segments pinnati- 

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

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

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

 /. 8m.).— By the sori shortly decurrent along the veins it forms a passage into Gywna- 



