656 FILICES. 



simple, or, if emarginate, forked veinlet, the lower inferior secondary ones fertile between 

 the 2 lowest segments of the inner margin ; indusium margined, much shorter than the 

 column : limb short, repand, or slightly 2-horned. — Hedw. Fit. t. 6. — T. scandens, Hedw. 

 (non Hook.). T. ambiguum, Sieb. T. brevisetum, R. Br. (T. europeeum, Sm.) : a short- 

 lobed form with the column less developed, from which, following V. d. Bosch, I exclude T. 

 speciosum, "VV. (Canary Islands!), for its longer, not margined petiole. — Leaf 6"-!^ high, 

 2"-6" broad: petiole l"-3"(-6 ,; ) long.— Hab. Jamaica!, Wils., Pd., on trees; [Cuba! 

 to French islands ! ; Mexico ! to Brazil ! ; Pacific islands !, East Indies ! ; T. brevisetum i 

 Azoric islands !, Madeira, and Ireland]. 



41. T. rigidum, Sw. Leaves csespitose, 3-pinnaliparlile, decurrent by a very narrow 

 line, glabrescent (or hairy at the rhachis) : tertiary segments linear, acuminate, with a 

 simple veinlet, the lowest of the vpper side fertile near the base of the inner margin : no 

 streaks ; indusium exserted, substipitate : limb short, crenulate-repand. — Hedw. Fil. t. 2. 

 — Leaf 6"-H' high, 2"-3* broad.— Hab. Jamaica!, Pd., on tree-roots; Dominica!, Imr., 

 Barbadoes !, Parker : [all tropical countries]. 



42. T. Prieurei, Kze. Leaves csespitose, Z-pinnatipartile, decurrent by a very Barrow 

 line, glabrescent : tertiary segments inferior pinnatifid-2-fid, superior and quart ernary ones 

 linear, bluntish, suberect, with a simple veinlet, the lowest of the upper side fertile near 

 the base of the inner margin : no streaks ; indusium exserted, substipitate : limb short, 

 subentire.— Hook. Spec. t. 40. C— T. anceps, Hook.— Leaf l^'-2'(-6") high, 5"-8"(-3") 

 broad. — Hab. Dominica !, Imr. ; Trinidad !, Pd., in woods ; [French islands ! to Peru ! and 

 Brazil!]. 



*** Leaf 2-pinnatisect : petiole and rhachis not margined. 



43. T. scandens, L., Sw., Hook, {non Kze.). Leaves scattered, 2-pinnatisect, hairy : 

 segments spreading, distant, secondary ones pinnatipartite, acuminate, tertiary pinnatifia, 

 or few-serrate, bluntish : lower lobes of the vpper side fertile on the inner margin : vein- 

 lets often forked : no streaks ; indusium sunk : limb short, truncate. — SI. t. 58. "r. 

 Epimel. t. 6. Kze. Farnkr. t. 130.— T. Sloanei, Kze. T. macroclados, Kze. T ; Lindeni, 

 Pr. Linnseus's authority for T. scandens {exclus. syn. Plum.) is clear from his words : 

 " ureeoli supra axillas." — Rhizoma " scandent ;" leaf 8"-2' high, 3"-6" broad.— Hab. Ja- 

 maica {SI., Pr.), in the Blue Mountains ; [Cuba !, Haiti]. 



44. T. trichoideum, Sw. Leaves delicate, scattered, or approximate, 2-pinnatisect, 

 glabrous : segments divaricate-spreading , secondary ones piunatipartite, tertiary distant^ 

 narrowly cuneate-linear, emarginate, or bifid, fertile on special pedicels above the base ot 

 the inner margin : veinlets simple in the ultimate lobes : no streaks ; indusium free : limb 

 short, truncate.— Hedw. Fil. t. 3./. 1. Schk. Crypt. 1. 134. Hook. Grev. Ic. 1. 199. Pr. 

 Epimel. t. 8. A.—T. capillaceum, L. {Plum. Fil. t. 99. D. : Davallia, W.) : excluded by 

 Swartz, who however took the badly-figured segments for terminal sori. T. tenellum, Hedw. 

 T. cuneiforme, Schk. T. angnstissimum, Pr. — Leaf 2"-10" high, cut into hair-shaped seg- 

 ments. — Hab. Jamaica !, Wils., Pd., on fern-stems, in moist woods, at 5000' alt. ; [Mexico . 

 to Brazil!]. 



§ 6. Indusium-limb spreading, dorsally 2-lipped. — Low ferns ; leaves conform, scattered 

 along the creeping rhizome, pinnatifid-entire {Didymoglossa, Desv.). 



45. T. Kraussii, Hook. Grev. Leaf deeply pinnatifid, or 2-pinnatifd, shortly pe- 

 tioled, or snbsessile, bearing cilia chiefly in the sinus of the lobes : lobes spreading, oblong- 

 linear, blunt, sinuate-repand : veins pinnately divided with alternate branches: veinlets 

 distant: streaks few, short ; indusium sunk into the lobes : limb 2-lipped to the base : co- 

 lumn twice as long as the indusium. — Hook. Grev. Ic. 1. 149. — T. reptans, Kze. {ex parte). 

 T. pinnatifidum, V. d. Bosch !: the 2-pinnatifid form.— Leaf l"-2£" long, almost pinnati- 

 partite. — Hab. Jamaica !, Pd., Wils., on trees ; Dominica, S. Vincent ; Trinidad !, Cr. 

 (T. pinnatifidum, V. d. Bosch) ; [Cuba! to French islands !; Guiana! to Peru!]. 



46. T. pusillum, Sw. Leaf irregularly pinnatilobed, or subentire, cuneate-oblong, <> r 

 heteromorphous, petioled (or subsessile), ciliate with stellate hairs, densely striated between 

 the dutant, alternate, simple veins, the latter connected by a juxtamarginal streak ; indusium 

 margined, or sunk below the summit: limb free, 2-lipped to the base : column exserted. 



