VEGETATIVE REPRODUCTION. 2$y 



Fig. 280. — Inflorescence of the dogwood (Cor nits florida\ showing four white bracts 

 below- it, giving the whole cluster the aspect of a single (lower. Two thirds natural 

 size.— After Baillon. 



Fig. 281.— Inflorescence oi yarrow {Achillea millefolium). A, seen from above; /■', 

 in longitudinal Bection. r, bracts, forming the involucre ; d, bra< 1- in whose axils the 

 flowers stand; ra, the ray flowers; »//, the disk flowers; .. corolla; '.ovulary; 1, 

 stigmas; >, the common torus. A magnified about 8 diam. ; B, about 15 diam Vftei 



