BOTANICAL TERMS. 



25 



(5) Dicecious, when starainate and pistillate flowers 

 are borne on different plants, as in Willow. 



(c) Poly(;a.mous, when there is a mixtvire of perfect 

 and imperfect flowers. 



(d) Complete, if all four ])arts, viz : calyx, corolla, 

 stamenri, and pistil, are present. 



(e) Incomplete, if any one or more of the four sets are 

 wanting. Incomplete flowers are arhhiviydKons when 

 calyx and corolla are both wanting;, as in Willow. 



(f) SvMMETRiCAL, if the different sets consist of the 

 same number of pieces each, or of a multiple of the same 

 number, for example : 4 sepals. 4 petals, H stamens, 4 

 carpels. 



(g) Unsymmetrical, if there are not the same number 

 of pieces (or a multiple of the same number) in each set. 



(h) Regular : when the pieces of each set are alike in 

 size and shape, as in Buttercup (Fig. 110). 



(1) Irregular : when the pieces of each set are not 

 alike in size and shape, as in Sweet Pea, Orchid, etc. 

 (Fig. 117). 



THE CALYX. 



Cohesion (union of like parts). 



Polysepalous : with the sepals entirely distinct from each 

 other, so that the}' can be pulled off separately, as in 

 Buttercup (Fig. 110). 



Gamosepalous : when the sepals are all united together 



(Fig. ll.S). 



The following terms are applicable to the gamosepalous 

 calyx : 



(a) The Tube : the lower united part (Fig. 118). 



(b) The Limb: the upper separated part (Fig. 118), 

 made up of lobes or teeth. In many composite flowers 

 the limb is pappose, consisting of fine bristles (Fig. 119). 



(c) The Throat : the entrance to the calyx-tube. 



Adhesion (union of unlike |);uts;. 



Inferior : when the calyx is plainly beneath the ovary and 

 free from it, as in Buttercup, etc. (Fig. 112). 



Superior : when the calyx-tube gi-ows fast to the outside of 

 the ovary and the limb rises above it. as in Apple, etc. 



(Fig. l-20'». 



Fig. 117. 





I'appus. 



Fig. 118. Fig. U'.: 





Fig. 120. 



