174 



INFLORESCENCE 



large bract or spathe. A head has a nearly spherical peduncle 

 with no perceptible internodes and with closely set sessile 

 flowers, as in buttonbush. The head of clover has a slightly 

 elongated peduncle from which grow numerous flowers. 



FIG. 107. Arrangement of Flowers. Racemes. 1, Foxglove (Digitalis pur- 

 purea) with bract subtending the pedicle of each flower; 2, lily of the valley 

 (Convallaria majalis) ; 3, black cohosh (Cimicifuga racemosa) . Panicles. 4, 

 steeple bush (Spiraea tomentosd). Corymb. 5, yarrow (Achillea Millefolium) . 

 Compound Corymb. 6, yarrow. 



A raceme has an elongated peduncle with well developed 

 internodes. From the nodes grow bracts and in the axils 

 of the bracts pedicled flowers, as in digitalis, lily of the valley 

 and black haw. A compound raceme or panicle is made up 

 of several racemes, as in meadowsweet. A corymb is an 

 inflorescence in which the peduncle branches and the pedicles 



