76 17. TRICnOMANES, §§ EUTRICIIOJIANES. 



flabellately divided into narrow dichotomous linear segments ; spurious venules 

 few ; sori 4 to 8, terminal on the central lobes, the mouth much dilated and 

 spreading, but not two-lipped. 



Hab. Fernando Po, Q. Mann.— Closely allied to T. parvulum, but a larger and more 

 deeply divided plant, with a broad plaited wiog all round the mouth of the involucre, 



24. T. proli/erum, Blume ; rhizome wide-creeping, densely interlaced ; st. 

 1-2 in. 1., slender, bearing 1 to 3 deeply divided fronds, which Avere not more 

 than 1 in. br. either way, varying from ovate-lanceolate to roundish in general 

 outline ; scgm. narrow, dichotomously branched, divided down nearly to the 

 central rachis ; veins numerous, irregular ; sori 4 to 12, terminal, the tube quite 

 sunk, the mouth obscurely two-lipped. — Hk. Sp. 1. p. 118. t. 39. B. T. pal- 

 matum, Presl. 



Hab. Java, Philippine Islands, Ceylon, and western slope of the Neilgherries. — Usu- 

 ally easily recognizable by its peculiar proliferous habit, but the fronds are very variable 

 in outline, and sometimes closely resemble the deeply-divided forms of section 3. 

 T. diffusum, Blume, and T. Teysmanni, V. D. B., are closely allied Javan plants, which 

 I have not seen. A plant collected by Barter at Sierra Leone is probably this species ; 

 but it is in a young state, and does not show the proliferous ramification. This species is 

 cut more deeply than the three preceding, and the segments are narrower. 



25. 1. flahellatiim, Bory (non V. D. B); st. 1 in. L, slender; fr. \\n. br., 

 flabellate-orbicular, the principal divisions reaching more than halfway down 

 from the circumference to the summit of the stipe, the ultimate divisions short, 

 the segments close together, broadly linear, obtuse, not toothed or ciliated ; 

 spurious venules none ; sori 2 to 4, terminal on the central segments ; invol. 

 turbinate, the mouth distinctly two-lipped, denticulate. — Hymenophyllum flabel- 

 latum, V. D. B. T. Sibthorpioides, Bor^. 



Hab. Bourbon. — Our description is taken from specimens referred to the plant of 

 Bory, on Dr. Van den Bosch's authority. Bory's plant came from the Falkland Islands, 

 and he did not know the fruit. Dr. Van den Bosch consirfers this a Hymenophyllum, and 

 Uses the name for a plant we have placed under T. digitatuni. There is an allied 

 T. TJiOuarsianum, Presl, from Bourbon, which we have not seen. 



2G. T. Powellii, Baker ; rhizome wide-creeping, tomentose ; fr. quite sessile, 

 ^ in. br., ^-1 in. 1., simple or once or twice deeply forked, dark brown in coloui-, a 

 single central costa only in each segment, the texture rather thickly membra- 

 naceous, the membrane on each side of the midrib slightly undulated, but the 

 margin neither ciliated nor toothed ; sori 1 to 4, terminal on the segments, nearly 

 or quite sunk ; invol. obconico-tubular, the mouth wide- spreading, two-lipped, 

 naked, not toothed. 



Hab. Samoa, Rev. T. Powell. — Allied to T. digitatum, but readily distinguishable by 

 the characters given. 



27. T. digitatum, Swartz ; st, very slender, naked, ^ in. 1. ; fr. 1-2 in. 1., 

 \-l in. br., irregular in general outline, divided down nearly to the base or a 

 broadly-winged rachis into long broadly linear dichotomous ciliated segments, . 

 with only a central costa in each ; sori 2 to 6, terminal on the segments ; invol. 

 cup-shaped, quite sunk, the mouth broadly dilated, slightly two-lipped. — Hk.Sp.l. 

 ». 1 1 9. T. hinceum, Bori/. Ilk. <£: Gr. Ici^Fil. t. 83. T. flabellatum and nitidulum, 

 V.D.B. — /3, T. palmatifidum, C. MuUer ; fr. ciliated more strongly and densely, 

 and not on the edge only, but also on the costa and margin of the invol, 



Hab. Mauritius, Bourbon, Java, and Polynesian Islands. — ^This is given as a Cape 

 plant, on Dr. Brown's authority, and there is a scrap from E. India from amongst 

 Mr. Griffith's plants in Herb. Hooker. The Ceylon Hymenophyllum corticola of our first 

 edition is a variety of this, and it Las been lately found in East Australia by Mr. C, Moore. 



