AN ENUMERATION OF CULTIVATED FERNS. 229 
1. C. officinarum, Willd. ; Hook. Gen. Fil. t . 113 ; Lindl. and 
Moore's Brit. Ferns, t. 43 A ; Lowe’s Ferns, 5, t. 54. 
Asplenium Ceterach, Linn. ; Hook. Brit. Ferns, t. 36. 
Genus 117.— Frond natural size, and portion enlarged. No. 1 . 
Grammitis Ceterach, Sw. ; Schk. Fil. t. 7 B ; Lodd. 
Bot. Cab. t. 15. Scolopendrium Ceterach, Eng. Bot. 
1244. — Europe, North India. 
Tribe X.— DICKSONIE.®. 
Sori marginal, round, or linear and transverse. Indusium 
lateral, interiorly attached, its extrorse margin free and con- 
niving more or less with the changed margin of the frond, which 
becomes an accessory indusium, the two forming a cucullate or 
bivalved round cyst, or elongated grove, containing the sporangia. 
