CUTTINGS AND GBAFTS 375 



472. The leaves of the Mexican bryophyllum 

 (which is often seen in greenhouses) send up 

 plants from their edges when they fall in moist 

 places (Fig. 396). Even the scales of bulbs some- 



y"" 



Pig. 396. 

 Leaf-colony of bryophyllum. 



times produce buds at the base and give rise to 

 new plants ; and the horticulturist often utilizes 

 this capacity to increase his stock of new or rare 

 varieties. 



473. The stems and even the leaves of some 

 plants produce numerous adventitious plantlets 

 (Figs. 397, 398) while they are still growing on 

 the parent plant, so impatient are they to multi- 

 ply. It seems as if the vegetable kingdom were 

 redundant with proereative vigor. 



