EXPLANATION OF TERMS 



An Entire Leaf is one the edge of which is not cut or lobed 

 in any way. (See Rhododendron, PI. XXII. , and Closed Gen- 

 tian, PI. CLI.) 



A Simple Leaf is one which is not divided into leaflets ; its 

 edges may be either lobed or entire. (See Rhododendron, PI. 

 XXII. \ also Fig. I.) 



F'g. 1. 



Fig. 2. 



Fig. 3. 



A Compound Leaf is one which is divided into leaflets, as 

 in Wild Rose, Pink Clover, and Travellers' Joy (PI. XL. ; also 

 Fig. 2). 



A Much-divided Leaf is one which is several times divided 

 into leaflets (Fig. 3). 



The Axil of a leaf is the upper angle formed by a leaf or 

 leaf-stalk and the stem. 



Flowers which grow from the axils of the leaves are said to 

 be Axillary. 



When leaves or flowers are arranged in a circle around the 

 stem they are said to be Whorled, or to form a Whorl. (See Ind- 

 ian Cucumber-root, PI. LX; Four-leaved Loosestrife, PI. LXVII.) 



A cluster in which the flowers are arranged — each on its own 

 stalk — along the sides of a common stem or stalk is called a 

 Raceme. (See Cardinal-flower, PI. CXXV. ; Shin-leaf, PI. 

 XXVI.) 



A Corymb is the same as a raceme, except that it is flat 

 and broad, a raceme becoming a Corymb if the stalks of its 



XXIX 



