CompositcB 171 



flowers in ray ; the receptacle has scales between the flowers. 

 Used medicinally. 



Arctium, Burdock. All flowers tubular, perfect, and in a 

 convex head ; a globose involucre present, with hooked points to 

 the bracts ; pappus short. Various parts of this plant may be 

 eaten, either as a salad or cooked (fig. 146). 



Artemisia, Wormwood. All flowers tubular, perfect, in a 

 flat head ; no pappus ; only few flowers in the head. A very 

 bitter plant, used in the manufacture of absinthe. 



Bellis, Daisy. Flowers as in Anthemis, but without scales 

 on receptacle ; involucre of two rows of equal bracts. 



Carduus, Thistle. All florets tubular, perfect, in a convex 

 head ; involucre swollen below, with thorn-like scales. 



Fig. 306. — Common receptacle Fig. 307. — Neuter flower 



of AntheTtlis arvensis, with of Cento-urea. Cy- 



paleae between the flowers. amis, 



Centatirea, Knapweed and Bluebottle. Florets tubular, 

 inner perfect, outer large and neuter, somewhat irregular (figs. 

 182 and 307). 



Chrysanthemum. Disc florets tubular and perfect, ray 

 florets ligulate and pistillate ; involucre flat ; receptacle naked, 

 and no pappus. 



Inula, Elecampane. Disc florets tubular and perfect, ray 

 ligulate, all yellow ; pappus present ; many-rowed involucre. 

 Formerly used as a sweetmeat. 



Senecio, Ragwort and Groundsel. Disc florets tubular and 

 perfect, ray ligulate and pistillate (latter wanting in Groundsel), 

 all yellow ; simple pappus ; scales outside the involucre. 



Tussilago, Coltsfoot. Flowers appear in spring before the 

 leaves J flower-stalks covered with gcale-like bracts ; kw disc 



