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JOURNAL OF THE ROYAL HORTICULTURAL SOCIETY. 



name Stellatae for the tribe. In many herbs the stipules are large and 

 foliaceous, as in the heartsease. 



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ii 



U — J 



7 



Fig. 85 Transition from Bud Scale to Foliage Leaf en Lilac. 



In some herbs growing in deserts and dry situations the stipules 

 become scarious, and completely conceal the buds behind them, protecting 

 them from the glare and heat. Such occurs in several members of the 

 Illecebraceae, the stipules being colourless and silvery. 



Fio. 86. — Lathybus Aphaca. 



In many xerophytic plants and trees the stipules assume the form of 

 spines, as in liobinia, Acucid, Xc. The interpretation may (theoretically) 



