84 17. TRICHOMANES, §§ EUTRICUOXIANES. 



Jladagascar. — This corresponds to the first section of the genus CepTialomanes oi Van den 

 Bosch, who makes nine species. 



60. T. pinnatum, Iledw. ; caud. erect, tufted ; st. strong, wiry, erect, naked, 

 or slightly hairy, 3-12 in. 1. ; fr. simply ])innate in the typical state, 4-18 in. 1., 

 3-12 in. br., the apex often rooting and proliferous •,pinnce in 2 to 10 opposite or 

 alternate pairs, and a terminal one, 2-6 in. 1., |- to | in br., linear-obtuse or 

 acute, sharply and finely toothed, the upper edge usually free from the stem at 

 the base, the under one attached and often furnished with a broad decurrent 

 wing ; texture sul)coriaceous ; central costa thick ; lateral veins fine and very 

 close, simple or forked, sometimes anastomosing ; sori placed all round the 

 pinnse ; invol. small, tubular, exserted or stipitate, tlie mouth slightly dilated ; 

 recept. long, filiform, exserted. — T. tloribundum, H.B.K. Hk. Sp. \. p. 1. 129. 

 Hk. £ Gr. Ic. Fll^t. 9.-/3, T. Vittaria, D. C. ; fr. 6-18 in. 1., about 1 in. br. 

 linear-lanceolate, entire. — Hk. iii Lond. Journ. Bot. 1. p. 117. t. 5. 



Hab. Tropical America, from Mexico and Jamaica southward to Erazil and Peru. — 

 This corresponds to the genus Neurnphyllum of Pres], Neuromancs of Van den Bosch. 

 The latter makes five species, of which N. abrvptum is distinguished from the other four 

 by the absence of spurious venules connecting the veins on each side of the central costa. 

 It is figured in Hk. G. F. t. 8, and is T. Hostmannianum, Klotzch. Some of Dr. Burchell's 

 specimens show the simple aud pinnate-fronded forms from the same root, 



ft Fronds decompound, slender, flaccid, ultimate segments very narrowly linear or 

 filiform. Sjj. 61-68. 



61. T. tenue. Brack. ; st. 1-2 in. 1., slender, naked ; fr. 2-3 in. 1., \.-\\ in. 

 br., ovate-lanceolate, tripinnatifid, main rachis very narrowl^^-winged in the 

 upper half ; innnc« cut down to a narrowly-winged rachis ; pinnl. again pin- 

 natifid, with a few long, narrow, distant, erecto-patent linear segm. ; both 

 surfaces naked, a central costa only in each segment ; sori 1 to 4 to a pinna, tube 

 exserted, the mouth widely dilated, naked, two-lipped. — Brack, t. 36./. 2. 



Hab. Tahiti. — This aud the next are not ao flaccid in habit as the rest of the group, 

 and have distinctly two-lipped involucres. 



62. T. hrevipes, Baker ; rhizome tomentose, with numerous short-branched 

 rootlets; st. very short; fr. 2-3 in. 1., 1-1| in. br., ovate-deltoid, fully pinnate, 

 or rachis veiy slightly winged at the apex ; pinnoe spreading, ovate, cut down 

 to a very narrowly-winged rachis ; lowest pinnl. again deeply pinnatifid, with 

 narrow linear segm., 1 lin. 1., \ lin. br. ; texture membranaceous, a single 

 costa only in each segment ; sori 2 to 8 to a pinna, axillary, tube more or less 

 exserted, mouth with two large rounded lips. — Didymoglossum brevipes, Presl, 

 Hym.p. 2.3. T. melanorhizon, Hk. Spi. l.p. 140. Ic. PL t. 705. 



Hab. Leyte, Philippine Islands, Cuming,l^o. 316. — Distinguished from the preceding 

 by its more numerous pinnules, each furnished with several comparatively short narrow 

 linear segments on both sides. 



63. T. Smithii, Ilk. ; st. tufted, 1-2 in. 1., slender, erect, naked ; fr. 4-8 in. 1., 

 1-1^ in. br., flaccid, lanceolate-oblong, tripinnatifid, main rachis only slightly 

 winged towards the apex ; pinnce cut down to a narrowly-winged rachis, the 

 divisions usually simple, occasionally forked, long, linear (^ lin. br., ^-\ in. 1.) ; 

 texture membranaceous, a central costa in each segment, the cells several times 

 broader than deep, separated from one another by continuous oblique vein-like 

 lines ; sori I to 4 to a pinna, axillary, tiie tube narrowly winged, the mouth 

 with two lateral j)rojections. — Ilk. Sp. Fil. I. p. 138. Ilk. Ic. t. 704. Habro- 

 dictyon Cumingii, Presl, Hym. t. 7. 



Hab. Philippine Islands. — Resembling T. tenerum and caudatum in habit, but the 

 venation is quite unique and very peculinr. 



