Fig. 261. Flowers of Arnica: A, lower part of stem, and upper part bearing a 

 head, in which are seen the conspicuous rays and the disk; D, single ray flower, 

 showing the corolla, tubular at base and stra})-shapcd above, the two parted style. 

 the tuft of pappus hairs, and the inferior ovary which develops into a seed-like 

 fruit (akene); E. single disk flower, showing tubular corolla with spreading limb, 

 the two-parted style emerging from the toj) of the stamen tube, the prominent 

 pappus, and the inferior ovary or akene; C, a single stamen.— After Hoffman. 

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