464 
FILICES. 
[ Trichomanes . 
Fronds middle-sized, tripinnatifid. 
Involucre with two large valves 7. T. bipunctatum. 
Involucre with a spreading collar-like limb .... 8. T. pyxidiferum. 
Fronds large and firm in texture, decompound. 
Ultimate segments ligulate, very short 9. T. rigidum. 
Ultimate segments very narrow, linear-subulate . . 10. T. parviflorum. 
1. T. Barklianum, Baker; Hook . and Baker , Syn. Fil. 74. Root- 
stock thread-like. Stipe in. long, filiform. Frond linear-oblong, 
entire, in. long, with a distinct midrib from base to apex and 6-10 
parallel erecto-patent veins on each side of it, without any faint inter- 
mediate veinlets. Sori one to a frond, terminal. Involucre cylindrical, 
immersed, with a broad spreading faintly two-lipped mouth. Baker in 
Journ. Linn. Soc. ix. 338, tab. 8, jig. D. 
Mauritius, at the falls of the Tamarin River, Sir Henry and Lady Barkly ! 
Endemic. 
2. T. cuspidatum, Willd. ; Hook, and Baker , Syn. Fil. 73. Root- 
stock thread like. Stipe in. long, filiform. Frond rhomboid, deltoid or 
semicircular, in. broad, entire or slightly lobed, the veins radi- 
ating like a fan through the upper half or two-thirds, with copious faint 
veinlets between them. Sori many to a frond, placed round the upper 
half. Involucre cylindrical, quite immersed, with a spreading collar- 
like entire mouth. T. adiantinum, Bory ; Bojer, Hort. Jfawr. 409. T. 
Bojeri, Hook and Grev. Ic. Fil. t. 155; Bojer, Hort. Maur. 409. 
Mauritius, in the forests of the Savanne and Grand Bassin hills. Seychelles, 
teste Kuhn. Rodriguez, Balfour ! Also Bourbon, Madagascar, and the Comoros. 
3. T. erosum, Willd. ; Kuhn. Fil. Afr. 34. Rootstock thread-like. 
Stipe filiform, in. long. Frond very variable in shape, lanceolate, 
oblong, deltoid or semicircular, entire or repand-pinnatifid, 1-2 in. long, 
with very abundant asceuding fine distinct veins, a zigzag central one 
distinct nearly to the top, accompanied by abundant faint intermediate 
veinlets. Sori one or many placed along the upper margin of the frond. 
Involucre immersed, cylindrical, with a large spreading collar-like nearly 
entire limb. T. muscoides, Hook, and Baker , Syn. Fil. 75. 
Seychelles, common in the mountain forests, Horne , 147 ! 672 ! 673 ! Cosmopo- 
litan in the tropics. 
4. T. digitatum, Sw. ; Hook, and Baker , Syn. Fil. 76. Rootstock 
wide-creeping, filiform. Stipe wiry, i—f- in. long. Frond 1-lJin, long, 
with 4-10 distant deep ascending flabellate strap-shaped segments 
^g — ^ x 2 in. broad, each with a distinct midrib and no other veinlets. 
Sori few to a frond, terminal on the segments. Involucre funnel- 
shaped, with an immersed tube, and two obscure valves. T. lanceum, 
Bory ; Hook, and Grev. Ic. Fil. t. 33 ; Bojer, Hort. Maur. 409. 
Mauritius, on trees and rocks of the Pouce and Savanne ranges. Also Asia, 
Polynesia, and Cape. 
