BUDS AND STEMS 



101 



Cabbage head cut lengthwise to show stem and leaves. Photographed by Overton. 



Factors which influence 

 the Opening of a Bud. — A 



bud responds to the same 

 stimuli that we have seen 

 call a young plant into ac- 

 tive life from the seed. If 

 a branch containing un- 

 opened buds (such as horse- 

 chestnut or willow) is placed 

 in water in a moderately 

 warm room, it will respond 

 to the factors without it 

 and begin to open. The 

 tips of branches, still at- 

 tached to the tree outdoors, 

 may be introduced into a 

 warm room through a hole 

 bored in the window sash. 



Thpv will nnpn to hpar flow- Blossom bud of NoKv-ay maple expandeil. show- 

 iney Wni open lO Dear now .^^ inconspicuous flowers. Photographed by 



ers and leaves during the Overton. 



