158 



Introduction to Botany. 



any direct bearing on pollination, and whether in the open 

 flower the relation of calyx or corolla to the stamens and 



pistil has anything to do 

 9 with pollination. 



F. If there are irregu- 

 larities of structure try 

 to find their significance. 

 126. Having become 

 familiar with the method 

 of working with flowers, 

 study the plant as a 

 whole, and make dia- 

 grams to show the habit 

 of plants, and the man- 

 ner in which the flowers 

 are borne. 



In showing the habit 

 of the plant and the 

 character of the inflo- 

 rescence, conventional 

 FlG g2 forms may be used. 



Conventional diagrams to represent a leaf /, TllUS l f F[ 8' 82 ma X 

 flower bud o, open flower/, fruit q, raceme r, Stand for a leaf, for a 



either cluster to the right and left of the cen- flower, and q f Or a f ruit. 

 tral flower would represent a simple cyme. T T . , , 



Using these symbols, 



the chief types of inflorescences may be represented as in 

 diagrams r to y in Figs. 82 and 83. r represents a raceme, 

 in which the axis of the inflorescence elongates with age, 

 giving rise to new flowers as growth in length proceeds, 

 each flower having its own stalk or pedicel, s represents 

 a spike or ament, which differs from a raceme in having 

 the flowers sessile upon the common axis, x is a diagram 



