1 82 



BUDS AND BRANCHES 



Compare your drawings with the section of a hyacinth 

 bulb or jonquil, and note the similarity in position of the 

 flower clusters. 



256. Study of an Alternate- 

 Leaved Bud. Examine a large 

 terminal bud of hickory, just 

 about to open. (Apple, pear, 

 cherry, etc., may be substituted 

 if necessary.) How do the 

 scales differ in shape and tex- 

 ture from those already exam- 

 ined ? Pick off the scales one 



333. -Cross section of a leaf j^y On6j no ting their position 



bud of the rose, showing, the alter- J 



nate arrangement of scales and Carefully and illustrating it by 

 rudimentary leaves: A growing diagram, as shown in Fig- 

 point; Z.1, youngest leaf ; Z. 2 , three . 



folded lobes of second leaf; .s* 2 , ure 333. This is another variety 



scales 68 f SeC nd kaf: Sel ~ Se *' of the imbricated arrangement, 



and is by far the most common, 



though much less simple than that of opposite-leaved buds. 

 How does it correspond with the arrange- 

 ment of leaf scars on the stem ? Refer 

 to Section 52, and say to what order of 

 phyllotaxy it belongs. Notice the grad- 

 ual change in the size and appearance 

 of the scales from the outside toward 

 the center. Can you give any reasons 

 for regarding them as transformed 

 leaves ? Sketch the bud in cross and 

 vertical section (unless this is impracti- 

 cable on account of the fur) and then 

 remove the contents. Notice the copi- 

 ous fur on the inner scales ; of what use 

 is it? Examine with a lens the little Jj" lir r y ^^^3 

 furry bodies within the scales and see pouter scales; /.folded 

 if you can tell what they are ; if you can leaf ; r> rece P tacle - 

 not, get a bud that is partly unfolded and you will probably 

 have no trouble in recognizing them as rudimentary leaves. 



334. Vertical see- 



