178 



JjJUSSON^S WITS PLANTS 



is, therefore, unlike the receptacle of single flowers. 



202. This flower -head also differs greatly from 



that of the dandelion, because it has a black- 



FlG. 178. 

 Yellow ox-eye or rudbeckia. 



brown center and a yellow corolla -like rim, h. 

 The green and hairy involucre is readily distin- 

 guished below, at *. Dissecting the flower, these 

 outer yellow petal -like bodies are found to be like 

 the figure at A. This suggests one of tne florets 

 of the dandelion, except that it has no essential 



