A CHAPTER TO STUDY. 13 



Odd-Pinnate : when an odd leaflet terminates the stalk. 

 (FiG. 46.) Sometimes this end leaflet is changed into a tendril, 

 which aids the plant in climbing. 



Leaves may be twice, thrice or more times compound. (FiG. 

 47.) The leaflets are subject to all the variations and may be 

 described after the manner of simple leaves. In fact, the expres- 

 sions here given are applicable to any flat part of the plant, the 

 petals or sepals as well as the leaves. 



Glaucous : when any part of the plant is covered with a 

 powdery substance called a bloom. 



Glabrous : when the parts are without bristles or hairs. 



Pubescent : when covered with fine hairs or downy. 



FIG. 47. FIG. 49. FIG. 50. 



The Stem is that part of the plant that grows upward to 

 the light and air, supports the foliage and makes it possible for 

 the leaves to expand and present as large a surface as possible 

 to the sunlight. Its manner of growth is described as be- 

 ing : 



Erect : when growing up vertically. 



Decumbent: lying on the ground but raising itself at the 

 end. (FiG. 48.) 



Procumbent : lying flat on the ground. (FiG. 49.) 



Creeping: running along the ground and rooting at the 

 joints. (FiG. 50.) 



A Simple Stem is one that is not branched. 



It is interesting to notice the wisdom with which stems ac- 



