4y 



(f) Buds. 



I. As to Position. 



1. Terminal : at end of twig. 



2. Lateral : along side.-? of twig. 



(a) Axillary, in the leaf axil. 



(b) Accessory, buds clustered around axil- 



lary buds. 



(c) Adventitioiis, buds produced irregu- 



larly. 

 Nodes: points on stem at which buds 



are produced. 

 Internodes: spaces between nodes. 

 II. As to Activity. 



1. Active : those that develop. 



2. Dormant: those that form but do not de- 



velop. 



III. As to Covering. 



1. Scaly: covered with dry, tough, bark-like 



layers. 



2. Naked : without scaly ^covering. 



3. Hidden : those buried under or in bark. 



IV. As to Arrangement. 



1. Opposite: two at same node and opposite. 



2. Whorled: three or more arranged around 



the same node. 



3. Alternate: in ranks around stem not being 



opposite or whorled. 



(g) Leaves : lungs of plants. 



1. Arrangement: alternate— poplar; opposite 



— maple ; clustered— pines ; scattered — 

 spruce. 



2. Parts: blade — thin expanded portion ; peti- 



ole — leaf stalk; stipules — pair of small 

 blades at base of petiole. 



