FILICES. 65S 



oMong-linear, bluntish, crennlate-repand, gkbrons ; indusium campaimlate, substipitate, trun- 

 c«ie.— Sterile leaves 4" long, 1" broad, fertile blade 2"-3" long, i'" broad.— Hab. Jamaica I, 

 Pd., Wils., along mountain-rivulets, S. Andrews, Bath, at 1800'-3500'alt.; S. Vincent I, 

 Guild. ; Trinidad I, Lockh., Pd., in rooky ravines, at the foot of. Mount Tocuche ; [Guade- 

 loupe! ; Panama, Guiana !, Ecuador!]. 



§ 2. Indusia sunh into a linear, special leaf, inserted along its whole margin into simple, 

 short veins, laterally cohering at the summit. — Sterile leaves deeply piunatifid : veins in 

 a network (JJymenostachlys, Bory). 



24. T. elegans, PLudg. Leaves caespitose, sterile deeply pinnatifid, shortly petioled, 

 fertile ones linear, denticulate by the marginal teeth of the indusia, supported by a slender 



petiole: sterile segments oblong-linear, blunt, cremilate, glabrescentj indiisia sunk, cyathi- 

 form, laterally dentate : teeth bluutish, common to each pair. — Hook. Gen. t. 108. — Ste- 

 rile leaves 3"-6" long, 1" broad, fertUe 6"-10" high, 3"'-3"' broad.— Hab. Trinidad !, Pd., 

 Cr., in marly ravines near Mount Tamana, Irais j [Panama !, Venezuela I, Guiana I to Peru ! 

 and Brazil!]. 



§ 3. Indusia at the summit or along both margins of the leaf-divisions : veins forked or 

 dichotomous. — Primary leaf-divisions undivided. 



* Indusia, or their summit exserted: limb very short or none. — Special leaves fertile. 

 (Neuromanes, Trevis^ 



25. T. pennatum, Kaulf. Leaves caespitose, pirmatipartite, very narrowly decur- 

 reut, glabrous or hairy at the rhachis, fertile along both margins : segments linear-oblong, 

 bluntish, denticulate, cohering by the narrowly margined rhachis, superior adnate, broadly 

 decurrent,/^?^?^ bluntly acuminate, uppermost much longer than the rest : veins approxi- 

 mate, forked or 2-partite, intermingled with a few simple ones, all connected by numerous 

 transverse streaks ; indusium exserted, stipitate or subsessile : limb very short or none, en- 

 tire or laterally 2-lobed. — Hook. Grev. Ic. t. 9. — T. floribundumi Hook. Neuromanes 

 Kaulfussii, V. d. Bosch. — 1-3' high ; segments of the sterile leaf 14"-2" long, 8" broad, 

 fertile 3"-6" long, 6"'-12"' broad; column usually .longer than in the following. — Hab, 

 Trinidad 1, Pd., [French islands !, and Mexico !, to Brazil !]. 



26. T. pinnatum, Hedw. Leaves cajspitose, pinnati^artite, very narrowly decurrent, 

 glabrous, fertile along both margins : segments linear-oblong, tapering-bluntish, denticulate, 

 most cohering hy the narrowly margined rhachis, superior adnate, usually decrescent, broadly 

 decurrent : veins approximate, forked or 2-partite, intermingled with a few simple ones, aU 

 connected hy transverse streaks ; indusium sessile, margined at the base or sunk -. limb 

 very short, spreading, entire. — Hedwy Fil. t. 4. /. 1. — ^T. floribundnm, Humb. sec. Kze. 

 Neuromanes Hedwigii, Y. d. Bosch. N. immersum, V. d. Bosch : the form with sunk 

 indusia. — 1'-2' high ; inferior half-segments 1"-2V long, 4"'-6"' broad, sterile shorter than 

 those of the fertile leaf, less tapering : petiole slender. — Hab. Jamaica {Hedw); Trinidad 

 (V. d. Bosch) ; [Haiti to French islands; Panama! to Brazil!]. 



** Indusia sunk: limb spreading. 



27. T. fastigiatum, Siei. Leaves approximate (" rarely scattered "), pirmatipartite, 

 pinnatisect at the base, not decurrent, hairy : segments horizontal or nearly so, cordate-ob- 

 long, blunt, repand, most approximate with a rounded or truncate sinus, lower sessile, often 

 distant : veins forked, lowest dichotomous, uppermost 3-5(-l) fertile, simple : no streaks ; 

 indusium sunk : limb spreading, laterally 1-lobed or repand. — Hedw. Fil. t. 4./. 2. Hook. 

 Grev. Ic. t. 12 : the form with scattered leaves. — T. crispum, Hedw. {non L.). T. pilosum, 

 Radd ex Kze. in PI. Kappl. 599. T. plumula, Pr. I T. accedens, Pr. T. cristatum, 

 Pr ex spedm. Kegel (non Kaulf .).— Leaves 6"-18" high, 1"-1V broad, often incurved. 

 —Hab. Jamaica {K d. Bosch.); S. Vincent!, Guild.; [French islands; Venezuela!, 

 Guiana!, Brazil!]. 



28. T. -peUaceus, Kn. Leaves &])]^voTiiiaa,te, pirmatipartite to the base, not decurrent, 

 glabrescent : segments horizontal, oblcfng, downward auricled, blunt, repand, most approxi- 

 mate lowest subdisant : sinus between thg superior ones rounded, between, the lower trun- 



' 2 u 2 



