FILICES. 653 



oblong-linear, bluntish, crenulate-repand, glabrous ; indusium campannlate, substipitate, trun- 

 cate.-— Sterile leaves 4" long, 1" broad, fertile blade 2"-3" long, k'" broad.— Ham. Jamaica !, 

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

 Guild.; Trinidad!, Locfch., Pd., in rocky ravines, at the foot of Mount Tocuche ; [Guade- 

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



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

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

 a network (Hymenostachys, Bory). 



24. T. eleg-ans, Rudg. Leaves csespitose, 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, crenidate, glabrescent ; indusia sunk, cyathi- 

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

 rile leaves 3"-6" long, 1" broad, fertile 6"-10" high, 2"'-3'" broad.— Hab. Trinidad !, Pd., 

 Or., in marly ravines near Mount Tamana, Irais; [Panama !, Venezuela !, 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 csespitose, pinnatipartite, 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, fertile 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. floribundum, Hook. Neuromanes 

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

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

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



26. T. pinnatum, Hedw. Leaves csespitose, pinnatipartite, very narrowly decurrent, 

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

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

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

 connected by transverse streaks ; indusium sessile, margined at the base or sunk : limb 

 very short, spreading, entire. — Hedw. Fit. t. 4. /. 1. — T. floribundum, Humb. sec. Kze. 

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

 indusia. — 1'-2' high; inferior half-segments l"-2i" 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 I]. 



** Indusia sunk: limb spreading. 



27. T. fastigiattun, Sieb. Leaves approximate (" rarely scattered "), pinnatipartite, 

 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 i no streaks ; 

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

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

 Radd. ex Kze. in PI. Kappl. 599. T. plumula, Pr. ! T. accedens, Pr. T. enstatum, 

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

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

 Guiana!, Brazil !]. 



28. T. peUucens, Kz. Leaves approximate, pinnatipartite to the base, not decurrent, 

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

 mate, lowest subdisant : sinus between the superior ones rounded, between the Inwer trim- 



