FILICES. 649 



Thibe I. OPIII0GL0SSE2E, R. Br. — Sporangia exannulate, coriaceous. 



1. OPHIOGLOSSUM, L. 



Son 2, linear, along a narrowly contracted, petioled leaf-segment, each of 1-scrial, co- 

 hering, vertically half-2-valved sporangia. — Fertile leaf-segments single (or several), in- 

 ferior. 



*■• O. reticulatum, L. Rhizoma excrescent; leaf single, cordate-deltoid, or subcor- 

 date, pointed, entire : no midrib ; veins in a network with appendages : fertile segment 

 (spike) single from the base of the blade, long-petiolulate, linear, mucronate. — Plum. Fit. t. 

 164. Hook. Grev. Ic. t. 20.— Leaf l"-3" diam — Hab. Jamaica !, mis., Pd., common in 

 coflfee-plantations. Port Koyal ; Montserrat (P. Br.) ; [Cuba ! to French islands !, and all 

 tropical countries]. 



2. MARATTIA, Sw. 



Sort longitudinally 2-partite, dorsal on a veinlet ; segments counivent, at length spread- 

 ing, 10-4-celled : cells (sporangia) dehiscent by vertical-iutrorse fissures. — Leaf 2— several- 

 times pinnate, stipulate : veinlets free, simple, or forked : petiole jointed : sori on the under 

 side of the leaf, single on their veinlet. 



2. M. alata, Sw. Leaf 2-pinnale, glabrous : secondary segments oblong-lanceolate, 

 pointed, superior sharply serrate, inferior pinnatifid below, lowest pinnatipartite : rhachis 

 usually paleaceous, secondary ones winged ; sori oval, sessile, supported by scales. — Sm. Ic. 

 Ined. t. 46. Hook. Gen. t. 26— 2'-3' high ; secondary leaf-segments 1* long, 4"' broad. 



Hab. Jamaica !, Pd., Al., Wils., in woods at the base of the Blue Mountains ; S. Vincent !, 

 Guild. ; [Cuba ! to Venezuela !]. 



M. laois, Sm. (serratures and lobes bluntish), was probably sent from Haiti, not from 

 Dominica ; but according to Mr. J. Smith (Bot. Herald, p. 343) it is only a form of M. 

 alata, Sw. 



3. DAN2EA, Sm. 



Sori linear, on approximate, excurrent veins, many-celled, surrounded by a plait : cells 

 (sporangia) 2-serial, dehiscent by a terminal pore. — Leaves pinnatisect {-simple), charta- 

 ceous : segments of the fertile leaf narrower than of the sterile one : veins costate, 2-par- 

 tite-forked, or simple : rhachis usually jointed. 



3. D. nodosa, Sm. Leaf segments linear-oblong, pointleted, quite eutire (or serrulate 

 at the summit), distant, " 15-jugal :" rhachis naked: fertile segments lanceolate-linear, 

 acuminate.— Plum. Fil. t. 108. Hook. Grev. Ic. t. 51.— Asplenium, L.— 4'-5' high ; 

 leaf-segments 10" long, li* bread, fertile ones 7"-4" long, 12"'-8"' broad.— Hab. S. Vin- 

 cent !, Guild. ; [Cuba ! to Brazil]. 



4. D. elliptica, Sm. Leaf-segments elliptical-lanceolate or lanceolate-oblong, point- 

 leted, quite eutire, distant, 4-6-jugal: rhachis slightly margined above : fertile segments 

 lanceolate, acuminate.— SI. t. 41. /. 1. Hook. Grev. Ic. t. 52. — 2' high ; leaf-segments 

 §*-!" long, 2"-H" broad, fertile ones 5"-2" long, 10"'-5"' broad.— Hab. Jamaica !, Pd., 

 in moist woods ; S. Vincent !, Guild. ; Trinidad !, Cr. ; [French islands ! to Venezuela !]. 



5. D. stenophylla, Kz. Leaf-segments linear or lanceolate-linear, pointleted-acumi- 

 nate, entire below the sharply serrulate summit, approximate, 12-lo-jugal, lowest shorter: 

 rhachis margined: fertile segments linear, acuminate. — Kurtz. Furnkr. t. 28. — 2'-3' high j 

 leaf-segments 4" long, 6"' broad, fertile ones 4"-l" long, 2"'-3'" broad.— Hab. Jamaica !, 

 Pd., in moist woods ; [Guadeloupe !]. 



6. D. alata, Sm. Leaf-segments linear-oblong, acute, or pointleted, sharply serrulate 

 towards the summit, 9-1 1-jugai, lowest short, more distant than the rest: rhachis nar- 

 rowly winged (except at the base) : fertile segments lanceolate-linear or oblong-liuear.— 

 Plum. Fil. t. 109. Hook. Grev. Ic. t. 18.— D. Moritziaua, Pd. sec. Eat. in PI. Wr.— 

 H'-2' high ; leaf-segments 3"-5" long, 8"'-10'" broad, fertile ones l"-3" long, 4"'-3 " 

 broad.— Hab. Jamaica (Sw.) ; S. Vincent (Guild.) ; [Cuba ! to French islands ; Vene- 

 zuela]. 



