p 



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

 and two leaves, one (7 1 ), of the present year, in full development; the other 

 (I 2 ), of the past year, dead and withered, or.b, apical bud at the extremity of a 

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

 roots ; Z., mature active leaf ; Z 2 , dead leaf of preceding year ; ?.m, lamina of leaf ; 

 p, pinna ; rJi, 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 g.) 



