208 



SPECIAL EXERCISES ON TYPICAL FLOWERS 



178. LILAC, FORSYTHIA, OR PRIVET 



Method. Make drawings of the flower, top view, show- 

 ing number, shape, and position of petals, and position and 

 number of stamens. 



Draw side view so as to show the calyx, the corolla tube, 

 and the general shape of the corolla. Split open the corolla 



between two of the 

 lobes and draw the in- 

 terior view, showing 

 the insertion of the 

 stamens, the anther 

 cells, and the lines 

 where they will split 



Corolla 

 '....Stamens- 



fCorollau 

 [ limb 



.Corolla tube! 

 Stamens inserted 



Calvjx 

 .Pedicel 



(Corolla aplirto 



when mature. 



Carefully pull off a 

 corolla and draw the 

 pistil as it stands in 



Stijmalshow stamens ,, n , 



c, txj i e the calyx. Cut away 



ilvjx one side of the calyx 



p et jj ce j and show the ovary. 



Answer the follow- 

 FIG. 92. The lilac. j ng questions : - 



How many petals ? Are they free or gamopetalous ? How 

 many stamens? What is their position relative to the 

 petals ? How many stigmas and how many parts has the 

 ovary ? 



This is a good example of what is known as a symmetrical 

 flower. It has sepals 4, petals 4, stamens 2, pistils 2, i.e. 

 one consisting of two carpels. 



What renders this flower attractive to insects ? 

 Suggestion. For comparison study flowers of forsythia, 



