312 



COMMON TREES AND SHRUBS 



Many variations in bud-suppression will be found by 

 careful examination of a Lilac shrub (Fig. 205, 1 to 5) : 



(1) The lowest two or three pairs of buds on a shoot are 

 very small, and usually remain dormant (db) ; (2) the 



Fig. 205. Lilac. 1, winter shoot : terminal buds suppressed, 

 lateral buds vigorous ; 2, forked branch formed from lateral buds, 

 between which are the remains of an inflorescence ; 3, branch with 

 persistent terminal buds, the two lateral buds dormant ; 4, terminal 

 flower-bud ; 5, dwarf shoot ; 6, young leafy shoot, showing transi- 

 tion from scaledeaves to foliagedeaves ; 7, flower ; 8, vertical 

 section of flower ; 9, inflorescence of Privet ; 10, part of inflorescence 

 showing flowers in small cymes ; a, anther ; db, dormant bud ; 

 ds, dwarf shoot ; f.b, flower-bud ; i, remains of inflorescence ; 

 ov, ovary; s, bud-scales; sc, scale-scars; st, stigma; s.t, suppressed 

 terminal bud. 



terminal bud often dies and growth is continued by the 

 next pair below (1 s.t) ; (3) the terminal bud may persist, 

 and suppression occur in one or both of the next buds 

 below (3 db) ; (4) often one of a pair lower down is 

 dormant (5 db) ; (5) occasionally buds grow very slowly 

 and form dwarf shoots (2 and 5 db). 



