AN ENUMERATION OP CULTIVATED FERNS. 209 
■flexuose, climbing to an indefinite height ; pinnae 1-2 feet long, 
adherent. Veins forked ; venules combined by a transverse 
marginal vein, and in the fertile also near their base by a 
transverse, continuous, sporangiferous receptacle, forming a 
linear costal sorus. Indusium revolute, vaulted, cylindrical, 
sporangiferous along its base. 
1. S. volubile, J. 8 m. in Hook. Gen. Fil. t. 93. Blechnum 
volubile, Kaulf. ; Kunze, Anal. t. 13 ; Hook. Gard. 
Ferns, 1. 15. Blechnum scandens, Bory, in Buy). Voy. 
t. 36. — Tropical America. 
Tribe IX.— ASPLENIE^E. 
Sori oblong or linear, oblique to the midrib or axis of vena- 
tion. Furnished with a plane or vaulted lateral indusium. 
110. ASPLENIUM, Jjinn, 
Vernation fasciculate, erect or decumbent, rarely uniserial 
sarmentose. Fronds varying from simple-entire to decompound 
and from a few inches to 2-6 feet high, generally smooth 
Veins rayed, forked, or pinnate ; venules free, sporangiferous on 
the superior side. Sori simple, oblong, or linear. Indusium 
plane or vaulted. 
§ 1. Aspleniuji verum. — Indusium plane. 
1. Lanceum group. 
Vernation uniserial, sarmentum slender. Fronds distant, 
linear-lanceolate, 1-1^ foot long. Sori simple, anti or opposite 
binate. (Triblemma.) 
1. A. lanceum, Thunb. Ic. Plant. Jap. Bee. 11, t. 18. A. subsi- 
nuatum, Hook, et Grev. Ic. Fil. t. 27. Diplazium lan- 
ceum, Presl. Scolopendrium dubium, Bon. — India, 
China, Japan. 
2. S erratum group. 
Vernation fasciculate, erect. Fronds simple, broad, elliptical, 
or lanceolate, 1-2 feet long. (Phyllitis.) 
2. A. serratum, Linn. (Plum. Fil. t. 124) ; Schk. Fil. t. 64 ; 
Hook. Fil. Exot. t. 70. — Tropical America. 
