CHAPTER IV, 
. 
“18. Ox: BYE ‘Datsy, orn MARrGuERITE* (Chrysanthemum 
leucanthemum). la 
We may take this familiar flower as a type of that largest 
group of flowering plants termed composites. 
We will proceed at once to examine the flowers and the 
first point. to notice is that the thing we usually, call | the 
flower is in reality a cluster of small sessile flowers (called 
florets) densely crowded together on a common receptacle. 
{f these florets were seattered along a rachis they probably 
would not make so conspicuous an ‘object as. they da when 
crowded together, but—as if in order to economize space ¢ as 
much as possible, and to make. them readily seen—they are all 
produced on one level (or only slightly convex) surface, the 
conumon receptacle. This form. of inflorescence d is called a head, 
Fig. 100.. Capitulam of Ox-ere 
Daisy from the back, showing 
Fig. 99. Gagitarans of Ox-ey RL involucral bracts. 
*In this case; as in .that of. other ty pe- plants abiaeteds one of the 
numerous other forms mentioned pores may be Substituted, taking 
care to notice minor differences. fs 
