ADVENTITIOUS BUDS. 171 
Bryophyllum calyeinum ; Weinmann! figures an instance 
of this kind in Alchemilla minima, or they may occur 
upon the lower surface of the leaf, as in Ornithogalwm 
scilloides and longe-bracteatum. 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. 4. 
Hoya, Gesnera, Gloxinia, &e. 
Formation of buds in the pith—This is said to be a 
7 1 «Phytanth.,’ n. 36, d. 
‘Ann. Science. Nat.,’ 5rd series, 1853, vol. xix, p. 251, tab. 14. 

