34 



FOOD RESERVOIRS 



multiplier or potato onion 

 (Fig. 45) is an example. 

 If the bulb is cut across, 

 it is found to have two or 

 more "hearts" or cores 

 (Fig. 46). When it has 

 been planted a week, each 

 core or part begins to 

 separate (Fig. 47), and 

 there are soon as many 

 onions as there are cores. 

 Potato onions can be 

 bought of seedsmen. They 

 are used for the raising of 

 earlj' - onions. 



81. Solid bulb- like parts are known as corms. These 

 usually have a loose covering, but the interior is not 

 made up of scales or plates. Of such are gladiolus and 

 crocus corms (Figs. 48, 49). Corms multiply by cormels 



Beginning to separate into its parts. 

 Each part will be a little onion. 



48. Corm of crocus. Nat. size. 



49. Section of a crocus conn. 



or small corms, as bulbs do by bulbels. Fig. 50 shows 

 an old gladiolus corm on which three new corms have 

 grown . 



82. We have seen that thickened parts may serve one 



