266 



PLANT LIFE. 



the main axis perishes at the end of the growing season 

 (fig. 299). 



367. (d) Cuttings or scions. Closely related to this 



mode of reproduction is that by the separation of fleshy 



FIG. 299. A seedling potato plant, c is the base of the stem, below which is the primary 

 root, r. The primary leaves ct, are still present. The early leaves, jf, are not so much 

 branched as later ones will be. In the axils of the lower leaves arise the branches b, 

 with scale leaves, e'c, and secondary roots, r', The tips of these brandies, when 

 illuminated, bear foliage leaves,./' ; but usually they thicken into tubers,/ 1 ^, which 

 have scale leaves, e'c', in whose axils buds, br, are formed, the so-called " eyes " of 

 the tuber. Natural size. After Duchartre. 



members, upon which are subsequently developed adventi- 

 tious buds, which give rise to new plants. The thick leaves 

 of Bryophyllum are often blown off by storms, and produce 

 new plants from buds formed at the teeth along the edge. 



