VEGE TA 77 VE RE PROD UCT10N. 



257 



FIG. 280. Inflorescence of the dogwood (Cormts _ftorida), showing four white bracts 

 below it, giving the whole cluster the aspect of a single flower. Two thirds natural 

 size. After Baillon. 



-ra 



Fir,. 281. Inflorescence of yarrow (A ch illea millefolium). A, seen from above: P, 

 in longitudinal section, t, bracts, forming the involucre; e/, bracts in whose axils the 

 flowers stand; ra, the ray flowers; /, the disk flowers; c, corolla ;_/, ovulary ; ti, 

 stigmas; r, the common torus. A magnified about b diam. ; B, about 15 diam. "After 

 Prantl. 



