AN ENUMERATION OF 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, /. 8m. in Hook. Gen. Fil. t. 93. Blechnum 



volubile, Kaulf. ; Kunze, Anal. t. 13 ; Hook. Gard. 



Ferns, 1. 15. Blechnum scandens, Bory, in Dup. Voy. 



t. 36. Tropical America. 



TRIBE IX.-ASPLENIE.S3. 



Sori oblong or linear, oblique to the midrib or axis of vena- 

 tion. Furnished with a plane or vaulted lateral indusium. 



110. ASPLENIUM, Itirm. 



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. 

 Ferns rayed, forked, or pinnate ; venules free, sporangiferous ^ on. 

 the superior side. 'Sori simple, oblong, or linear. Indusium 

 plane or vaulted. 



1. ASPLENITJM VERUM. Indusium plane. 



1. Lanceum group. 



Vernation uniserial, sarmentum slender. Fronds distant, 

 linear-lanceolate, 1-1% foot long. Sori simple, anti or opposite 

 linate. (Triblemma.) 



1. A. lanceum, Thunb. Ic. Plant. Jap. Dec. 11, t. 18. A. subsi- 



nuatum, Hook, et Grev. Ic. Fil. t. 27. Diplazium lan- 

 ceum, Presl. Scolopendrium dubium, Don. India, 

 China, Japan. 



2. Serratum group. 



Vernation fasciculate, erect. Fronds simple, broad, elliptical, 

 or lanceolate, 1-2 feet long. (Phyllitis.) 



2. A. serratum, Linn. (Plum. Fil. t. 124) ; ScTik. Fil. t. 64 ; 



Hook. Fil. Exot. t. 70. Tropical America. 

 p 



