CHAP, vni BUDS 49 



3. That some contain flowers only. They are flowe r buds. 



4. Make sketches of the cut surfaces in each case. 



XI. The buds which we have been studying, have all been 

 winter buds, formed towards the end of the season of growth 

 and then resting before expanding to furnish the shoots of 

 the next season. But we may find buds at the end of any 

 stem or branch which is actively growing. 



Examine the end of a branch of some actively growing 

 plant, such as a Sunflower, a Fuchsia, a Bean, or a Pea, 

 and notice : 



1. The smaller or larger bunch of leaves, more or less 



closely folded together. This is a vegetative bud. 



2. Watch this or any winter bud as it unfolds and notice : 



3. The lengthening internodes separating the leaves from 



one another. 



4. The unfolding and expanding of the leaves. 



XII. The buds which we have been studying thus far 

 have all ben regularly placed either at the top of the stem 

 or upon the sides, in or near the axil of a leaf. 



Sometimes buds appear upon the internodes of the stem, 

 upon the roots, or even upon the leaves. Such buds appear- 

 ing out of the ordinary positions are called adventitious buds. 



1. Examine the buds which appear upon a Sweet Potato (a 



root) which has been kept partly immersed in water 

 for two or three weeks. They are adventitious buds. 

 Sketch. 



2. Examine the buds which appear in the indentations of a 



leaf of Bryophyllum (a not uncommon greenhouse 

 plant) which has been cut off and pinned up against 

 the wall for a week or two. They are adventitious 

 buds. Sketch. 



