Propagation by Detached Parts. 



189 



352. The Bulb is a very short stem containing a ter- 

 minal bud inclosed in scales (128). The scales are thick- 

 ened by a store of food, and in their 

 axils are smaller lateral buds. The 

 terminal bud usually develops into 

 a flower, and then perishes. One or 



FIG. 86. PIG. 87. FIG. 88. FIG. 89. 



Fig. 86. Bulb of the common onion, Allium cepa, divided lengthwise. 

 B, buds. 



Fig. 87 > Bulb of garlic, Allium sativum. It contains several smaller 

 bulbs (cloves). 



Fig. 88. Bulb of wild lily. 



Fig. 89. The same divided lengthwise, showing buds, B. 



more of the lateral buds may develop into flower-buds 

 for the next year, and thus continue the life of the plant, 

 as in the common onion (Fig. 86); or the lateral buds 

 may develop at the expense of the parent, as in the po- 

 tato onion. 



353. Bulbletsor 

 B u I b e I s are small 

 bulbs formed in the 

 axils of the leaves in 

 certain plants, as the 

 tiger lily,* (Fig. 90), 



FIG. 90. Bulblets in^ls of leaves of tiger Of at the a P 6X f the 



my. stem, as in the "top" 



or bulb-bearing onion (Fig. 91). 



* Lilium tigrinmn. 



