466 
FILICES. 
[Trichomanes . 
subulate dark brown scales. Stipe wiry, ft. long, naked except 
near the base. Erond oblong-lanceolate, 6-12 in. long, 3-4 in. broad, 
quadripinnatifid, firmer in texture than in almost any other of the 
filmy-ferns, the rachis winged at the top only. Pinnae and pin- 
nules crowded, lanceolate. Ultimate segments under x \ in. long, with 
only a narrow wing to the stout rigid midrib. Involucre minute, more 
or less exserted, the mouth faintly two-lipped and not expanded into a 
collar ; receptacle much exserted. T. stylosura, Boir.j Kuhn , Fit. 
Afr. 37. T. obscurum, Blume ; Kuhn , Fil. Afr. 35. T. tamarisciforme, 
Jacq.j Kuhn , Fil . Af. 38; Bojer , Hort. Mciur. 410. T. achilleaefolium, 
Willd.j Bojer, Hort. Mciur. 410. T. longisetum, Bojer , Hort. Maur. 
410, not Bory. 
Mauritius and Seychelles, common in the hillwoods. Round the world in the 
tropical and sub-tropical zone. I have not seen an authentic example of T. mei- 
folhtm, Bojer, Hort. Maur. 410, from the forests of Savanne. 
10, T. parviflorum, Boir.; Kuhn, Fil. Afr. 35. Closely allied to 
T. rigidum , with which it quite agrees in general habit, but from which 
it differs by its much longer narrower ultimate segments, which are 
almost reduced to the vein, and by its still smaller involucre, which is 
quite exserted from the lamina and not more than in. long by half as 
broad. T fceniculaceum, Bory j Hook. and Baker , Syn. Fil. 88; Bojer , 
Hort. Maur. 411. 
Mauritius, in the woods of the Savanne and Grandport ranges. Also Bourbon, 
Madagascar, the Malay isles and Australia. 
4. CYATHEA, Sm. 
Capsules with an incomplete slightly oblique vertical ring, forming 
dense globose sori, placed on an elevated receptacle, and often mixed 
with jointed filaments, included in a complete membranous cup, which is 
placed on the middle of a vein on the under surface of the frond. — Tree- 
ferns, with ample bipinnate or tripinnate fronds, the stipes and rachises 
often prickly. Disturb. Cosmopolitan in tropical and subtropical 
regions, few African. Species 70-80. 
Frond bipinnate 1. C. canaliculata. 
Frond tripinnate. 
Involucre regularly truncate 2. C. sechellarum. 
Involucre breaking up irregularly 3. C. excelsa. 
1. C. canaliculata, Willd.j Hook, and Baker, Syn. Fil. 23. 
Erond bipinnate, 1-2 feet or more broad, membranous or subcoriaceous, 
green and quite naked on both surfaces, with pale or dark brown unarmed 
rachises, usually quite naked, rarely with a thin coating of tomentum on 
the under side. Pinnae lanceolate, ^-1 ft. long, 1-2^ in. broad. Pin- 
nules close, lanceolate, adnate, toothed in the upper half, i-lf in. long, 
f in. broad. Veins fine, distinct, slightly ascending, 15-40-jugate, 
forked. Sori in a long row at the forking of the veins, near the midrib. 
