142 



STRUCTURAL BOTANY. 



[121, 122. 



and nearly sessile flowers, as in Sweet- William (Dian- 

 thus). 



366. Glomerule, an axillary tufted cluster, with a 

 centrifugal evolution, frequent in the Labiatse, etc. 

 When such occur in the axils of opposite leaves and 

 meet around the stem, each pair constitutes a verticil- 

 laster or verticil, as in Catmint, Hoarhound. 





457 



367. The above diagrams show the mutual relations of the several forms 

 of centripetal inflorescence how they are graduated from the spike (457) to 

 the head (464). Thus the spike (457) + the pedicels = raceme (458) ; the raceme 

 with the lower pedicels lengthened = corymb (459) ; the corymb the rachis = 

 umbel (460) ; the umbel pedicels = head (464), etc. 



(For the phenomena of Mowering, Coloring, the Moral Calendar, the 

 Floral Clock, see the Class Book of Botany, pp. 75-77.) 



