6 PKINCIPLKS OF ri.ANT-TEEATOLOGy. 



In some of the plantains (Plantago major and P. 

 lanceolata) the apex of the spike may develop further 

 to form a rosette of foliage-leaves. A similar pheno- 

 menon is seen in the Inpin (PI. XXVI, fig. 3). 



Good instances of iiomial vegetative proliferation 

 are the pine-apple {Bromelia Ana-itas) and the bottle- 

 brush {Gallistemon). 



2. The Flowei;. — Here also tlie proliferation may 

 be reproductive or vegetative. 



In the case of the former, in many plants the floral 



Fia. 61. — jRosa centifolia (Garden Rose). Proliferation of flower into a 

 small jnlloresceuce bearing two roses. 



axis may .elongate and produce an entire inflorescence^ 

 as in Trifoliuiv. repevs and in many Compositee, e.g. 

 the "hen-and-chickens"-daisy {Bellis perennis var.), and 

 the sneeze-weed {Ileleimim avtvmnale). In the plan- 

 tains, most pronounced in F major, the individual 

 flowers of the spike develop into branches whose 

 flowers may do the same until sometimes as many as 

 six or seven generations of branches may constitute 

 a complex panicle replacing the normal spike (PI. 

 XXVII, figs. 2 and 3). 



In the feather-hyacinth (Mitfcari camosiim) there is- 

 a remarkable variety in which the flowers of the spike 

 are replaced by delicate, elongated branches which are 



