XXIV 



EXPLANATION OF TERMS. 



Crenate : when the margins appear to be scalloped, or have rounded 

 teeth. (Fig. 14.) 



Serrate : when the teeth of the margins are short and sharp and point 

 forward. (Figs, ii and 12.) 



Dentate : when the teeth are large and point outward. (FiG. 20.) 



Incised: when the teeth are uneven and jagged and extend well into 

 the leaf. 



spat he and Spadit. 

 FIG. 32. 



Corymb. 

 FIG. 34 



Lobed : when, the margins are cut so as to extend about half-way to the 

 midrib, thus forming distinct lobes. (Figs. 13 and 17.) Such leaves then 

 are spoken of as being three-lobed, five-lobed, or according to the number 

 existing. 



Cleft as a term has much the same significance as lobed, but the incisions 

 of the leaf reach more than half-way to the midrib. (Figs. 13 and 19.) 



Divided: when the incisions extend to "the midrib. 



Sinus is the term used to express the hollow or curve made between the 

 projecting teeth or lobes. 



Bracts are the modified leaves of an inflorescence and are under the 

 flowers. Usually they are green, and differ in outline from the rest of the 

 foliage, or they may be highly coloured and conspicuous. 



The Inflorescence is the way in which the flowers are arranged on the 

 stem. It may be either determinate or indetermina.te. 



