FILICES. 671 



134. P. arachnoidea, Kaalf. Leaf S-pinnatisect, sericeous or villous beaeath : ulti- 

 mate segments oblong-liaear, or oblong, bluut, aduate at the base, most abruptly produced 

 downward into a transversely half-elliptical or lanceolate auricle, distant : rhachis hairy : 

 petiole pale, with " 12" bundles ; membranaceous part of the revolute margin glabrous, 

 distant from the rib.— Segments l"'-3"' broad, variable in length. — Hab. Jamaica (Jg.) ; 

 Trinidad I, Cr., heights of S. Anne ; [Cuba ! ; Venezuela !, Guiana !, Ecuador I, Peru I, 

 BrazU!]. 



Series 2. Asplenieee. — Sori dorsal, decurrent along veins, or covering the surface. 



19. T.ffi!NlTIS, Sw. 



Sori oontinaous, lining the margin of the leaf, or parallel to it, confined to a special ana- 

 stomosis of the veinlets, naked, — Leaves narrow, entire, or forked-pinnatipartite with entire 

 segments. 



135. T. angnstifolia, R. Br. iso/' chartaceous, linear-lanceolate, entire, tapering at 

 both ends, glabrous : veins in sub-4-serial, narrow meshes, devoid of appendages ; iors juxta- 

 marginal, very little distant from the flat edge, decurrent to near the tapering leaf-base. — 

 Book. Gen. 't. 77. A.—Vteiis, Sw. Pteropsis, JDesv.—Leat H'-i" long, 9'"-4"' broad, 

 " pendulons." — Hab. Jamaica !, Macf., Pd., on rocks and trees ; S. Vincent !, Guild. ; 

 Trinidad !, Pd. ; [Cuba I and Mexico to equat. Brazil ! ; Galapagos 1]. 



136. T. lanceolata, R. Br. Leaf coriaceous, lanceolate, entire, undulate-flexuose, 

 glabrous, tapering into a short petiole : network of veins irregular, provided with appendages ; 

 sori lining the margin, slightly embraced by its revolute edge, confined to the upper part of 

 the leaf. — Plum. Fil. t. 132. Pee, Polypod. t. 8. 0. — Pteris, -£. Pteropsis, Besv. Neu- 

 radium,i%. — Leaf l^"-6" long, 12"'-6"' broad about the middle. — Hab. Jamaica!, Macf, 

 Pd., on trees ; [Cuba I to French islands ! ; Belize !]. 



137. T. farcata, W. Zeaf li^dL-cliaH&ceoaa, distantly pinnatiparte-S-Z-fld, tai^ermg 

 at the base of the narrow, fertile part, bearing scattered, appressed scales beneath, shortly ■* 

 petioled, or sessile : segments and rhachis linear, or oblong-linear : veins 2-fid, usually free 

 (except at the fertile anastomosis) ; sori lining the margin (or transversely confluent), slightly 

 embraced by the revolute edge, confined to the upper part of the segments. — Plum. Fil. 

 t. 141. Fee, Polypod. t. 8. A. — Pteris, L. Cuspidaria, F4e. Dicrauoglossum, /. Sm. — 

 14'-3"high. .. 



o. Leaf tapering into the sessile base : segments oblong-linear below the tapering summit, 

 8"'-4"' broad. 



fi. subpinnatifida, Tee. Leaf tapering into a sEbrt petiole : segments linear, 2"'-4"' 

 broad. — Hook. Grev. Ic. t.-l. 



Hab. Trinidad !, Sch., Pd., on trees ; [Cuba ! ; Panama ! to Guiana ! and equat. Brazil]. 



20. VITTAKIA, Sm. 



Sori continuous, sunk into a groove, inserted into a special anastomosis of veinlets, either 

 panllel to the margin of the narrow, entire leaf, or within its duplicate margin itself. — 

 Veins simple between the midrib and the anastomosis of the groove : plaits along the latter 

 replacing an indusium. 

 / 138. V. lineata, Sie. Leaf long, rigid, obtusely costate beneath; sori shortly distant , 

 from the margin.— Plum. Fil. t. 143; sori wrongly at the margin. Schk. Crypt, t. 101. 



j gin Pteris, L. — Leaf l'-2i' long, l"'-2"' broad; sori usually more distant from the 



midrib than from the margin, rarely equidistant from both. — Hab. Jamaica !, Masson, Wils,, 

 Pd., common on trees j S. Vincent !, Guild., Barbadoes !, Sw. ; [aU tropical countries to 

 Florida and the Cape !J. 



21. ANTKOPHSUM, Xaulf 



Sori continuous upon distinct parts of the network of veins, in several lines not reaching to 

 the base,' the midrib, or the margin of the entire leaf. — A''eins in a network, devoid in our 

 species of veinlets or appendages; sori linear, naked, or lined with plaits. 



