Adiantum .] 
FILICES. 
475 
oblong-reniform, several to a segment, absent from its lower half. 
Involucre firm, broad, persistent. A. emarginatum, Bory ; Bojer, 
Hort. Maur. 404. A. fumarioides, Willd.; Bojer , Hort. Maur. 405. 
Mauritius, on the banks of the Black River and at the Tamarin Cascade, etc. 
Spread through the warmer regions of both hemispheres, especially Cape and 
Australia. 
11. HYPOLEPIS, Bernh. 
Capsules stalked, splitting transversely, with an incomplete vertical 
ring. Sori marginal, globose, placed in sinuses of the ultimate lobes 
of the frond. Involucre reniform, membranous, formed of the modified 
margin of the frond wrapped over the sorus. — Large decompound ferns, 
with free veins and wide-creeping rootstocks. Distrib. Tropical and 
south-temperate regions. Species 11. 
1. H. anthriscifolia, Bred. ; Hook, and Baker , Syn. Fil. 129. 
Rootstock stout, wide-creeping clothed with minute linear-subulate 
brown scales. Stipes distant, pale bright brown, like the rachises 
slightly pubescent and scabrous. Frond 6-10 feet long, deltoid, 4- 
pinnatifid, membranous, bright green, with minute linear scales on the 
ribs beneath. Pinnae deltoid, the lowest the largest, 1-2 feet loug. 
Ultimate segments lanceolate, i-f in. long, deeply pinnatifid, with 
upcurved adnate oblong lobes, each bearing a small round sorus in a 
hollow of its upper margin. Involucre narrow, membranous. H. spar- 
sisora, Kuhn , Fil. Afr. 120. Adiantum altissimum, Bojer , Hort. Maur. 
405. 
Mauritius, in the gorges of the Black River and Savanne ranges. Also Bourbon, 
and widely-spread through Tropical Africa and the Cape. 
12. LONCHITIS, Linn. 
Capsules stalked, splitting transversely, with an incomplete vertical 
ring. Sori marginal, half-moon-shaped, confined to the ultimate 
sinuses. Involucre membranous, narrow, formed of the modified edge 
of the frond reflexed and wrapped over the sorus. — Large ferns of 
membranous texture, with broad leafy segmeuts and anastomosing veins. 
Distrib. One other species in West Africa. 
1. L. pubescens, Willd. ; Hook, and Baker , Syn. Ml. 128. Root- 
stock erect. Stipe stout, 1-2 feet long, densely clothed, like the 
rachises, with short spreading ferruginous hairs. Frond deltoid, 3-4 
feet long, membranous, pubescent, bipinnate. Pinnae oblong-lanceo- 
late, the lowest the longest, 1-1 \ foot long, its lower pinnules free, 
spreading from the rachis at a right angle, f-1 in. broad, with broad 
obtuse shallow or deep lobes, and one semicircular sorus at the bottom 
of each of the narrow sinuses. Veins uniting in one or two rows of broad 
areolae between midrib and edge, which do not contain any free vein lets. 
