CLASS1FICA T10N. 



233 



leaves. The smaller plants have no flower and but one leaf, 



while the bulb is nearer the surface. Each year new bulbs are 



formed at the end 



of runners from a 



parent bulb. These 



runners penetrate 



each year deeper 



in the soil. The 



deeper bulbs bear 



the flower stems. 



378. Genus 

 lilium. While the 

 lily differs from 

 either the trillium 

 o r erythronium, 

 yet we recognize a 

 relationship when 

 we compare the 

 perianth of six 

 colored parts, the 

 6 stamens, and the 

 3-sided and long 

 3-loculed ovary. 



379. Family Fig. 203 . 



Adder-tongue (erythronium). At left below pistil, and three 



llliaCeSB. The re- stamens opposite three parts of the perianth. Bulb at the 



right. 



lationship between 



genera, as between trillium, erythronium, and lilium, brings us 

 to a still higher order of relationship where the limits are broader 

 than in the genus. Genera which are thus related make up the 

 family. In the case ot these genera the family has been named 

 after the lily, and is the lily family, or LiliacecE. 



380. Order, class, group. In like manner the lily family, 

 the iris family, the amaryllis family, and others which show 

 characters of close relationship are united into an order which 

 has broader limits than the family. This order is the lily order, 



