17. TIUCHOMANES, EUTRICHOMANE8. 87 



12-18 in. 1., 6-12 in. br., broadly ovate, tri- or quadri-pinnatifid ; main rachis 

 very narrowly winged throughout or above only ; lower pinnae 4-6 in. 1., 

 ovate-rhomboidal, cut down to a narrowly-winged rachis ; pinnl. again deeply 

 pinnatifid, with rather distant, long, linear, sharply-toothed or pinnatifid segnir-f 

 texture subcoriaceous (three layers of cells), colour dark-green, nearly black 

 when dry, surface a little hairy ; veins close, often more than one in the ultimate 

 segments ; sori 2 to 12 to a pinnule, small, axillary, often recurved, tube free, 

 much dilated, not two-lipped. T. anceps, a, Hk. Syn. 1. p. 135. t. 40. C. (non 

 WallicJi). T. Leprieurii, Hk. Gard. Ferns, .11. Davalliopsis, F. D. B. 



Hab. West Indian Islands southward to Peru and Brazil. T. Weddellii, elegans, and 

 opacum, V. D. B., apparently must be referred here. 



74. T. giganteum, Bory ; rhizome wide-creeping, tomentose ; st. 4-6 in. 1., 

 strong, erect ; fr. 12-18 in. 1., 6-9 in. br., ovate, quadri-pinnatifid ; main rachis 

 hardly at all winged above ; lower pinnae ovate-lanceolate, 6-8 in. 1., cut down to 

 the rachis ; pinnl. 1 in. 1., cut down very nearly to the rachis, the divisions 

 again deeply pinnatifid ; ultimate segm. linear, distinctly flattened, 1 lin. 1., 

 J lin. br., surface dark-green, naked, shining, texture between rigid and mem- 

 branaceous ; a central vein only in each segment ; sori 2 to 20 to a pinnule, 

 axillary ; tube more or less exserted, mouth rather dilated, not two-lipped. Hk. 

 Sp. 1. p. 137. Ic. PI. t. 702. T. elatum, F. D. B. 



Hab. Mauritius, Bourbon, Joanna Island, Malayan Archipelago and Fiji group. A 

 handsome plant, distinctly quadri-pinnatifid, the most ample and divided species of the 

 genus, nearest T. meifolium, but neither so rigid or coriaceous, and with shorter ultimate 

 segments. 



75. T. Sprucei^ Baker ; st. nearly tufted, 1-3 in. 1., wiry, erect, naked, slightly 

 winged above ; fr. 3-4 in. 1., 1^-2 in. br., erect, ovate-deltoid, acuminate, 

 tripinnatifid ; main rachis very narrowly winged throughout ; pinnce erecto- 

 patent, cut down to a very narrowly- winged rachis ; lower pinnl. deeply pin- 

 natifid, with forked or even pinnatifid lower segm. ; ultimate segm. flat, linear, 

 1^-2 lin. 1., texture sub-membranaceous, surface naked, dark olive-green when 

 dry, a single vein only in each segment, cellules large ; sori 2 to 12 to a pinna, 

 tube small, nearly free, mouth slightly spreading. 



Hab. North of Brazil, Spruce, 1399 and 2838. A more deeply divided plant than 

 T. gemmatum, with a subdeltoid outline, more numerous sori, less rigid habit, and dis- 

 tinctly flattened segments. 



76. T.gemmattim,J Smith ; rhizome strong, wiry, tomentose, beset with numerous 

 long black wiry fibres ; st. 1-3 in. 1., naked, wiry, winged above ; fr. 2-6 in. ].,' 

 1-2 in. br., erect, subrigid, ovate-oblong, bipinnatifid ; main rachis narrowly 

 winged ; pinnce erecto-patent, cut down to a narrowly-winged rachis ; lower 

 pinnl. deeply forked with subrigid, linear-filiform segm. 1^-2 lin. 1., cellules 

 large ; sori 1 to 8 to a pinna, minute, axillary, the tube turbinate, stalked, the 

 mouth nearly truncate. T. cellulosum, Sturm, Hk. 2nd Cent. Ferns, t. 63. T, 

 filiforme, Sturm. T. longisetum, Brack. T. Asse-Grayi, F. D. B. T. foenicu- 

 laceum, Hk. Sp. 1. p. 135. (in part}. 



Hab. Venezuela, north of Brazil, Polynesian Islands, Java, Philippines, and Malayan 

 Peninsula. 



77. T. longisetum, Bory ; rhizome strong, wiry, tomentose ; st. 1-4 in. 1., erect, 

 wiry, tomentose, not at all winged ; fr. 3-8 in. 1., 1-2 in. br., erect, subrigid, 

 lanceolate or ovate-lanceolate ; main rachis quite free ; pinnce spreading or 

 erecto-patent, 1-1^ in. 1., cut down to the rachis ; pinnl. cut down into numerous 

 filiform capillary segm. 1^-2 lin. 1., colour dark-brown or blackish ; a central 

 costa only in the segments, not visible except under a high magnifying power ; 



