34 BLECHNUM. 



mately uniting over the whole. Common. 

 Shrivels under heat and sunshine, and 

 fails otherwise occasionally when taken 

 from walls. From hedgerows more suc- 

 cessful, and larger. Ornamental, but not 

 peculiarly striking or curious. 



VIRIDE. (Green-stalked Spleenwort.) 



Fig. 34. From 2 to 8 inches. Growing 

 in circular masses. Resembling the pre- 

 ceding, except that the stem is greener, the 

 pinnae lighter in colour, alternate, regu- 

 larly indented, somewhat wedge-shaped, 

 and narrowed a trifle to both ends. Some- 

 times the fronds are forked above. Sori, 

 when fullest and united, not quite extended 

 to the margin. May. Sometimes earlier. 

 Evergreen. Hare. Northern rocks. Not 

 easy of removal, from the tenacity of its 

 roots. Succeeds fairly. Safest under 

 glass. 







BLECHNUM. 



Sori on the back, in two longitudinal lines 

 near the centre. Indusia attached on the 

 outer side, and parted on the inner by 

 the midrib. 



BLECHNUM BOREALE. (Northern Hard Fern.} 

 Fig. 26. Barren fronds from 9 to 12 

 inches : fertile from 12 to 20. Root tufted. 



