Ll/copodium.] CUYPTOGAMIA FILICES. 381 



a membrane, opening internally. — Name, vrs^ig, in Greek, a 

 JFe7-n : from rn^v^, a plume or feather, 



9. Cryptogramma. Soji at length confluent and marginal. 

 hivolucre formed by the revolute margins of the pinnules, which 

 in a young state meet at the h-Ack: partial none. — Name; xou^xto;, 

 concealed^ and yga/X/;X?5, a line ; from the concealed lines of cap- 

 sules. 



10. Blechnum. Sori linear, longitudinal, contiguous, parallel, 

 one on each side of the rib. Involucre continuous, opening in- 

 teriorly. — Name, (SXriXvov, another Greek name for a,fer?i. 



11. Adiantum. tS'on oblong or roundish. Itivolucres mem- 

 branaceous, arising from distinct portions of the margin of the 

 frond, turned in, opening interiorly. — Name, adiavroc, — that 

 which is of a dri/ 7iature. 



12. Trichomanes. Sori marginal. Capsules upon an elon- 

 gated receptacle, within a cylindrical, or suburceolate, mono- 

 phyllous involucre which is of the same texture as the frond, 

 opening above. — Name ; -^s/^, '^^'/C^i^ a hair, and //.wjia, excess : 

 from the numerous hair-like, exserted receptacles of the sori. 



13. Hymen'ophyllum. Sori marginal. Capsules upon a 

 narrow receptacle, within a 2-valv'ed involucre which is of the 

 same texture as the frond, opening above. — Named from j/z^/j, a 

 membrane, and cpuWov, a leaf; an admirably characteristic appel- 

 lation. 



** Capsules spiked or clustered, regularly 2-valved, without a ring. 



(OsMUNDACE^ and OPHIOGLOSSEiE, Br.^ 



14. OsMuNDA. Capsules subglobose, pedicellate, clustered, 

 striated, half 2-valved. Involucre none. — Name, probably given, 

 as Sir J. E. Smith suggests, in honour of some person. Osmund, 

 in Saxon, is said to mean domestic peace. 



15. Botrychium. Co/;s?</e5 subglobose, sessile, clustered at 

 the margin and on one side of a pinnated I'achis, 1-celled, 2- 

 valved, compressed, opening transversely. Involucre none — 

 Name ; — l3orD-jg, a bunch of grapes ; from the appearance of the 

 branched clusters of capsules. 



16. Ophioglossum. Capsules 1-celled, 2-valved, opening 

 transversely, connate, forming a compact 2-rauked spike. Invo- 

 lucre none. — Name, — o:pic, ofnoc, a serpent, and ■y},o66a, a tongue, 

 which the spike of fructification somewhat resembles. 



SuBORD. I. LYCOPODIACE^. 



Fructifications sessile, in the axils of leaves or bracteas. Capsules 

 without a ring, 2 — 3-valved. 



1. LvcoPODiuM. Capsules 1-celled ; some 2-valved, includ- 



