Im. 



' * 1 \ > x j~ 



FIG. 44. The Brake (Pteris aquiUna\ showing part of the underground stem (r.h) 

 and two leaves, one (!>), of the present year, in full development; the other 

 (I s ), of the past year, dead and withered, a.b, apical bud at the extremity of a 

 branch which bears the stumps of leaves of preceding years and numerous 

 roots; l>, mature active leaf ; 1", dead leaf of preceding year ; Z.m, lamina of leaf ; 

 p, pinna ; r./i, portion of main rhizome ; -.r, younger pinna, which is shown en- 

 larged at B. This pinna is nearly similar to the pinnules of older pinnae. (X J. 



