CHARACTERS OF TRIBES AND GENERA. 323 
183.—Micropopium, Mett, 
Annals of the Leyden Museum. 
Asplenium and Scolopendrium sp., Hook. Sp. Fil. 
Vernation uniserial, sarmentum slender, wiry, scandent. 
Fronds distant, simple, linear-lanceolate, rarely pinnate, 
1 to 2 feet in length, 1 to 3 inches in breadth, smooth. Stipes 
in some articulate with the caudex. Veins simple or forked, 
sporangiferous on one or both sides. Jndusium simple as in 
Asplenium, binate as in Diplazium, or oppositely conniving as 
in Scolopendrium. Sori linear continuous, having an elevated 
ridge or crest on their exterior side or between them. 
Type. Scolopendrium longifolium, Presl. 
Oss.— The principal character that has led Mettenius to 
. separate the species of this genus from Asplenium, is that 
.. the vernation of several of them is apparently articulate, as 
also having an elevated ridge on the exterior side of simple 
. sori, and also between the connivent sori. The articulated 
. vernation, if it really is so, is confined in this family to this 
and the preceding genus, bnt as the nature of the fronds 
agree with Asplenium, I therefore deem it best to place 
. them here; they form a very natural group, distinguished 
3 by their slender creeping caudex from the great mass 
of Asplenium. 
— Sp. M. lanceum (Thunb. Ic. Plant. Jap., Dec. 11. t. 18; 
Asplenium subsinuatum, Hook. and Grev. Ic. Fil, t. 27; A. 
sect. Triblemma, J. Sm. Ferns Brit. and For., p. 209). 
. Oss.— The sori of Asplenium, Diplazium, and Scolopen- 
drium, are often produced on the same frond of this species. 
M. vittæforme, Mett. (Cav.) (Asplenium Amboinense, 
Brack, Fil, U. S. Expl. Bep, p. 147, t. 19, f. 2) ; M. Sun- 
nse (Blume) ; M. Fijeense (Brack, Fil, U. S. Expl. Ezp., 
19, f. 1); M. scolopendrioides, J. Sm. (Hook, Ic. PL, | 
