SCALE-LEAVES, FOLIAGE-LEAVES, FLORAL-LEAVES. 



631 



either in the apices of the lobes or serrated teeth of the margin, as in hazels, oaks, 

 chestnuts, hornbeams, and hop-hornbeams (see fig. 149''), or in the indentations 



Fig. 149.— Arrangement of Strands in the blades of Foliage-leaves. Forms with one main strand. 



' Reticulate (Pynis communis). 2 Looped {Rhamnus Wulfenii). » Arched {Cornus mas). * Arched ; the two lowest lateral 

 strands much stronger than the others (Laurus Camphora). « Reticulate-pinnate (Populus pyramidalis). ^ Undivided 

 strands, ending in the incisions of the crenate leaf margin {Rhinanthiis). i Undivided strands, terminating in the 

 projecting teeth of the margin (Ostrya). » Reticulate {Hydrocotyle asiatica). » Reticulate strands in the blade of a 

 peltate leaf {Hydrocotyle vulgaris). 10 Looped {Myosotis palustris). n Arched (Phyllagathis rotundifolia). i* Radiate 

 and undivided (Acer platanoides). w Looped (Eugenia). 



of the margin, as in Bartsia, Eyebright, and Yellow-rattle (Bartsia, Euphrasia. 

 and Rhinanthus), and, generally speaking, in all Rhinanthaceae (see fig. 149^). 



