STEMS 



63 



(2) The large horseshoe-shaped scars and the number and posi- 

 tion of the dots on these scars. Compare a scar with the base of a 

 leaf-stalk furnished by the teacher. 



(3) The ring of narrow scars around the stem in one or more 

 places, 1 and the different appearance of the bark above and below 

 such a ring. Compare these scars with those left after removing the 

 scales of a terminal bud and then see Fig. 29, b sc. 



(4) The buds at the upper margin of each leaf- 

 scar and the strong terminal bud at the end of the 

 twig. 



(5) The flower-bud scar, a concave impression, 

 to be found in the angle produced by the forking 

 of two twigs, which form, with the branch from 

 which they spring, a Y-shaped figure (see Fig. 36). 



(6) (On a branch larger than the twig handed 

 round for individual study) the place of origin of 

 the twigs on the branch ; make a separate sketch 

 of this. 



The portion of stem which originally bore any 

 pair of leaves is called a node, and the portions of 

 stem between nodes are called internodes. 



Describe briefly in writing alongside the sketches 

 any observed facts which the drawings do not show. 



If your twig was a crooked, rough-barked, and 

 slow-growing one, exchange it for a smooth, vig- 

 orous one, and note the differences. Or if you 

 sketched a quickly grown shoot, exchange for one 

 of the other kind. 



Answer the following questions : 6 sc bud-scale scars. 



(a) How many inches did your twig grow A11 above these 

 -, , , , scars is the growth 

 during the last summer? of the spri * g and 



How many in the summer before? summer of the 



How do you know? 



How many years old is the whole twig given you ? 



(b) How were the leaves arranged on the twig? 



..b sc 



Cherry, with Lat- 

 eral and Terminal 

 Buds in October. 



same year. 



1 A very vigorous shoot may not show any such ring. 



