6 BUDS AND STIPULES 



which touch all the way round, leaving between them 

 an almond-shaped space, in which the next pair are 

 enclosed ; they in their turn surround the third, and 

 so on. 



Mesembryanthemum Mandum has the leaves oppo- 

 site, triquetrous, 3-5 cm. long, rounded on the dorsal 

 edge, very shallowly grooved on the upper surface. 



FIG. 7. LEAF OF PLANE (Platanus), showing mode of protection 

 of the young bud. 



more decidedly so at the base, and connate there, form- 

 ing a sheath 3-5 cm. long, which remains green after 

 the stem it encloses has become ripened and brown. 

 The middle line of the sheath that is, the line of 

 junction of the two leaves becomes brown with age 

 while the thicker portion is still green. 



In other plants, as in Stachys (fig. 6), the leaves 



