14 
FERNS OF THE 
* Gymnogramme.® — Sori linear, no indnsium : one 
only genns — Gymnogramma. 
Aspidie.® — Sori round or roundish, springing from 
the backs of the veins, having a special indusium : 
two genera — Polystichum, Lastrea. 
Asplenie^j — Sori oblong, or elongated, springing from 
the sides of the veins, having a special indnsium : 
four genera — Athyrium, Asjplenium , Scolojpendrium, 
Getarach. 
Lomarie.® — Sori forming longitudinal lines between 
the midrib and margins of the leaflets, or divisions, 
of the fronds, with a special indusium : one genus — 
Blechnum. 
Pteridea: — Sori borne upon the frond-margins, which 
are changed, continuously or interruptedly, into 
special indusia : one genus — Pteris. 
* Adiante.® — S ori in patches on the reflexed lobes of 
the frond-margins, which form indusia : one genus — 
Adiantum. 
CYSTOPTERiDEiE — Sori with special oval indusia affixed 
behind and bent hook-like over them : one genus — 
Gystopteris. 
Peraneme.® — Sori roundish and springing from the 
backs of the veins, with special involucriform or 
semi-involucriform indusia : one genus — Woodsia. 
* Of Gymnogramme^e — genus Gymnogramma — there is only 
one British species, the Small-leafed Gymnogram — G. lepto- 
phylla, lately found in Jersey, hardly therefore a British fern at all. 
Of AdiantEjE again its one British genns, Adiantum , has only 
one species, the common Maiden-hair Fern — A. Camillas Veneris, 
not found in the Lake District. Neither is the one British species 
of the genus Trichomanes, the Bristle Fern — T. radicans. 
