10 GENERAL BIOLOGY. 



tween (a) and (5), and contain- 

 ing starcli (phloem-parenchyma). 

 4. Within the phloem is the xylem or 

 wood. !N- te : 



(a) Large eir tj vessels with thick 



walls (tracheids). 



(b) Small vessels (tracheae). 



(c) Small parenc '-cells contain- 



ing starch, i spaces between 

 the angles of vessels (wood-pa- 

 renchyma). 

 Sketch the outline of a fibrovas<. " bundle and 



some cells of each kind in their relation to one 



another. 



6. In a prepared longitudinal sec. find the 



kinds of cells just seen in tra sec- 



tion. 

 Sketch. 



7. Crush a piece of rhizome that has been v>> >cerated, 



and ivith the high power find the var- ^ kinds 

 of cells now more or less isolated. xS/w. 'eft. 

 III. The' Leaf. 



1. Strip off a piece of the epidermis from th 1 wver 

 side of the leaf, mount in water, and no. 



(a) The ordinary epidermis-cells with \v 



outlines. 



(b) The guard-cells, two surrounding each 



stoma. 

 Sketch accurately (much enlarged) two guard-cells, 



