l60 FERNS : BRITISH AND FOREIGN. 



tifbrm, medial. Sori round. Indusium lateral, oblong or 

 reniform, cucullate, dentate or fimbriate. 



Genus 76.— Portion of fertile frond, under side. No. 3, var. 



i . C. tenuis, Schott ; Lowe's Ferns, 7, t. 35. Aspidium tenue, 

 Sw. ; Sclih. Fil. t. 53 B. Aspidium atomarium, 

 Mulil. ; Willd. Cystopteris atomaria, Presl. — North 

 America. 



£. C. bultoifera, Bemh.; Lowe's Ferns, 7, I. 36. Polypodium 

 buibiferum, Linn. Aspidium bulbiferum, Sw. ; Schk,. 

 Fil. t. 57. — North. America. 



8. C. fragilis, Bemh. ; Hooh. Gen. Fil. t. 52 B ; Lindl. and 

 Moore's Brit. Ferns, t. 46 A, f. 1 ; Sowerby's Ferns, 

 t. 19. Polypodium fragile, Linn. Aspidium fragile, 

 Sw. ; Schk. Fil. t. 54. Cyathea fragilis, Sm. ; Eng. 

 Bot.t. 1587. 



Var. dentata, Hooh.; Lindl. and Moore's Brit. 

 Ferns, t. 46 A, f. 4 ; Lowe's Ferns, 7, t. 32. Oysto- 

 pteris dentata, Hooh. ; Sowerby's Ferns, t. 21. 

 Cyathea dentata, Sm. Eng. Bot. t. 1588. Poly- 

 podium dentatum, Dicks. 



Var. Dicldeana, Moore ; Lindl. and Moore's Brit. 

 Ferns, i. 46 A, f. 5, 6 ; Hooh. Brit. Ferns, t. 23, 

 /. 4, 5. Oystopteris dentata, var. Dicldeana Bab. ; 

 Sowerby's Ferns, t. 22. 0. Dickieana, Sim. ; Lowe's 

 Ferns, 7, t. 33. 



Var. sempervirens, Moore; Lindl. and Moore's 

 Brit. Ferns, t. 46 A,f. 2, 3. 



Var. angustata, Linh ; Moore's Nat. Print. Ferns, 

 Oct. Ed. 2, t. 102 G ; Sowerby's Ferns, t. 20.—!; 

 Temperate Begions of the Northern Hemisphere, 



