ADVENTITIOUS BUDS. 



171 



Bri/ophyllum calycinum ; Weinraann^ figures an instance 

 of this kind in Alch-emilla minima^ or they may occur 

 upon the lower surface of the leaf, as in Ornithogaliim 

 sciUoides and lon-ge'lrradeatum. M. Duchartre^ men- 

 tions a case in the tomato in which the leaves gave 

 origin to small leaf-bearing branches, which, of course, 

 must have originated from buds, just in the same way 

 as in the Drosera before mentioned. 



Fig. 82, Formation of shoot on leaf of Episcia bicolor. 



Gardeners occasionally avail themselves of this for- 

 mation of buds from leaves to propagate plants, e. y. 

 Hoy a, Oesnera, Gloxinia j &c. 



Formation of buds in the pith. This is said to be u 



' ' Phytanth..* n. 36, d. 

 'Ann. Sc-ienc. Nat.,' 3rd scries. 18o;>. vol. xix, p. 251. lal>. 1 1^ 



