40 



ZHSSOJrS WITH PLANTS 



common plants for accessory buds ; he will find 

 that in some plants they are superposed (one 

 over the other), and in others they are collateral 

 (or side by side). At all 

 events, it is certain that some 

 plants produce more buds than 

 leaves. 



37. The leaf-scar of the com- 

 mon sumac (Fig. 37), the plane 

 tree (often called sycamore and 

 buttonwood), the common lo- 

 cust, and a few other plants, 

 encircles the bud. If one were 

 to examine the twig the previous 

 season, he would find that the 

 bud is concealed within the hol- 

 lowed base of the leaf-stalk. 

 Such buds may be said to be 

 calyptrate (covered with a 

 hood) . 



38. A bit of an old dahlia 

 stalk is shown in Fig. 38. 

 The leaf-scars are prominent, 

 in the form of a ring (for the 

 leaves are borne on opposite 

 sides* of the stem, and the 

 bases of the stalks are much 

 Fig. 39 is a stem 



Fig. 38. 



Fig. 39. 



Leaf -scars 

 of dahlia. 



Leaf attach- -..■, . jv 

 ment of a reed, allatecl) . 



