Flowers. 



I SS 



flower, the upper sepal with its long spur and one of the 

 upper petals with its spur projecting into that of the upper 

 sepal may be shown in the longitudinal diagram, as in A, 

 Fig. 79- In tne cross diagram the fact that the upper 

 sepal and the two upper petals each form a tube below 

 may be indicated by dotted lines, as in B, Fig. 79. 



FIG. 79. 



A, longitudinal, and B, cross 

 diagram of the flower of 

 the larkspur. 



Diagrams of composite flowers. A, cross 

 diagram of a flower with ligulate co- 

 rolla; B, cross diagram of a flower 

 with tubular corolla; C, longitudinal 

 diagram of a flower. 



The method of diagraming composite flowers is shown 

 in Fig. 80. A is a cross diagram of a flower with ligu- 

 late corolla. The stamens are shown to be syngenesious 

 by lines uniting the backs of the anthers, and the radiating 

 lines from the backs of the anthers signify that the sta- 

 mens are inserted on the corolla. The dotted line complet- 

 ing the petaline whorl indicates that the corolla is tubular 



