34 



FOOD RESERVOIRS 



multiplier or potato onion 



(Fig. 45) is an example. 



If the built is eut 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 



early 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 



47. Beginning to separate into its parts 

 Each part will be a little onion. 



48. Corm of crocus. Nat. size. 



49. Section of a crocus corm. 



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

 an old gladiolus corm on which three new corms have 

 grown. 



82. We have seen that thickened parts may serve one 



