84 



LESSONS WITH PLANTS 



the Virginia creeper (Fig. 79)? The petiole is 

 plain; but shall we say that there are five distinct 

 blades, or that the blade is divided into five parts! 

 Figs. 80 and 81 are leaves from one grape vine. 



Pig- so. 

 Grape leaf. 



Fig. 81. 

 Deeply-lobed grape leaf. 



Each plainly is one leaf. The formei has three 

 well marked lobes, and the latter has these lobes 

 much more deeply cut. In fact, there are strong 

 indications of five parts. It is not difficult to imag- 

 ine the clefts extending to the mid-rib, as they 



