462 filtces. \_HymevopJiylhm . 
H. emersum, Baker, Syn. Fil. edit. i. 457. H. ricciaefolium, Bory j 
Beyer, Hort. Maur . 411. 
Mauritius, in forests of the Savanne range, Lady Baricly ! Fresanges on the 
base of mossy trees, Cattell. Also Ceylon, Bourbon, and Madagascar. 
3. H. inaequale, Desv. ; Kuhn , Fil. Afr. 40. Stipe 2-3 in. long, 
wiry, subulate. Frond oblong-lanceolate, 3-4-pinnatifid, 3-6 in. long, 
1-2 in. broad, glabrous, with distant ascending pinnae and pinnules. 
Pachis winged only towards the top of the frond. Ultimate segments 
ligulate, entire, £ in. long, in. broad. Sori many to a frond, ter- 
minal on the lower segments of the upper pinnae. Involucre as broad as 
the segments, with an immersed deltoid base and semicircular valves. H. 
gracile, Bory ; Kook, and Grev. Ic. Fil. t. 198 ; Hook, and Baker , Syn. 
Fil. 58. 
Mauritius, in forests of the Pouce range and Quartier Militaire. Also Bourbon, 
Madagascar, and Natal. 
4. H. polyanthos, Sw.; Kook, and Baker , Syn. Fil . 60. Stipe 
wiry, 1-2 in. long. Frond oblong-lanceolate, glabrous, 4-pinnatifid 
3-6 in. long, 1-2 in. broad, flaccid, pendulous, the main rachis 
winged throughout. Pinnae lanceolate, the divisions of all grades more 
numerous and closer than in K. ineequale, the final segments T V~8 m - 
in. long by in. broad, entire. Sori often several to a pinna, terminal 
on the lower segments. Involucre broader than the segments, the 
base very slightly immersed, the valves semicircular. 
Seychelles, common in the woods of Mahe, Horne, 146 ! Cosmopolitan in the 
tropics, but rare in Africa. 
5. H. Boutoni, Baker . Stipe uuder an inch long, winged at the 
top. Frond lanceolate, bipinnatifid, 2-3 in. long, |— ^ in. broad, thinly 
pilose, with the main rachis distinctly winged throughout. Pinnae 
cuneate-deltoid, the lower consisting of 4-6 ascending entire segments, 
which are i—^in. long by ^ in. broad. Sori many to a pinna, terminal 
on all the segments, and broader than they are. Involucre immersed 
at the base, densely matted with ferruginous hairs ; valves semicir- 
cular. 
Mauritius, Bouton ! Endemic. Intermediate between H. ciliatum and linear e, 
with the narrow frond and cutting of the latter, and the winged main rachis and 
large involucre of the former. 
6. H. ciliatum, Sw. ; Kook, and Baker, Syn. Fil. 63. Stipe 
1-2 in. long, pilose, distinctly winged in the upper half. Frond 
oblong-deltoid, 2-4 in. long, 1-2 in. broad, 2-3-pinnatifid, densely 
clothed with short brown hairs, the main rachis winged throughout. 
Pinnae crowded, lanceolate, cut away on the lower side at the base ; 
segments entire, contiguous, reaching i in. long by in. broad. 
Sori many to a pinna, terminal on any of the segments, and as broad 
as they are. Involucre immersed at the base, densely tomentose ; 
