PLATE III. 
1. 




WP...-J ees Piqua 
Teh FL f = 
si = t= ate 

I. Herb Robert: Pores on the underside of the leaf. The dark ovals 
with a white line down the middle enclose the pores. » 130. 
Fig. 36. 
Il. Herb Robert: leafstalk cut across to show the four bundles 
containing the water-pipes. 12. Fig. 37. 
III. Herb Robert: one of the bundles in the leafstalk cut downwards 
to show the water-pipes running lengthways, as at WP. x 100. 
Fig. 38. 
P. 96.) 
