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aw A TEXT-BOOK OF BOTANY 
of the leaf is indicated by the leaf scar, immediately above 
which the three buds appear. In the common bush honey- 
suckle, three to six buds appear in cach axil. 
In all such cases the extra buds are called 
accessory buds, 
33. Adventitious buds.—Since the tips of 
stems or branches and the axils of leaves are 
the usual places for buds, those which occur 
in other positions are called adventitious buds. 
Such buds appear on stems (on the inter- 
nodes), roots, and even leaves, and very 
commonly they arise as a result of injury. 
On the trunks of trees, even at the base, 
wounds often result in the formation of buds 
and the development of vigorous young 
branches usually called suckers or water 
sprouts. Often from a stump young shoots 
arise, and the process of pollarding consists 
in cutting off the crowns of trees that new 
branches may be developed in connection 
Fic.67.—Branch With the wound. In the willows, for example, 
cae the production of such shoots is so prompt 
lateral, and ac- and they are so vigorous and pliable that 
cevory buds twigs for basket-work are obtained from them 
inthis way. In propagating plants by root- 
cuttings, as can be done with blackberries and raspberries, 
advantage is taken of the fact that some roots can produce 
buds. In propagating by stem-cuttings it is the axillary 
buds that develop the new shoots; but in root-cuttings the 
new shoots arise from adventitious buds. That leaves also 
may produce adventitious buds is shown in connection with 
the practise of propagating begonias by leaf-cuttings. 
It is evident, therefore, that while plants ordinarily 
produce terminal and axillary buds, under certain con- 
ditions buds may be developed and shoots arise at any place. 
