IO 



A CHAPTER TO STUDY. 



off from the midrib and branch again into veinlets that run to- 

 gether and form a network, or mesh. (Fio. 30.) Netted- 

 veined leaves are said to be Feather-Veined when the sec- 

 ondary veins all start from the sides of the midrib, running 

 from the base to the apex of the leaf. (Fie. 31.) They are 

 called Palmately-Veined when several veins of equal size 

 start from the same point at the base of the leaf and spread out 

 towards the margin. 



Parallel-Veined leaves are those in which the main veins run 

 side by side, without branching or running together. (FiG. 32.) 



The veining of the leaves is always in complete harmony 

 with their shape, so that much can be learned by noticing this 

 feature carefully. 



FIG. 33. FIG. 34. FIG. 35. FIG. 36. 



Leaves vary greatly in general outline, and the following 

 terms are used to designate some of their common forms : 



Linear : the narrowest form of a leaf several times longer 

 than broad : grass-like. (FiG. 32.) 



Lanceolate : long and narrow, slightly broader at the base 

 and tapering towards the apex. (FiG. 30.) 



Oblanceolate is a reversed lanceolate. 



Oblong; when two -or three times broader than long. 

 (Fio. 31.) 



Elliptical : oblong but tapering at both ends. (Fie. 33,) 



Oval : broadly elliptical. (FiG. 34.) 



Ovate : when the outline is similar to the shape of an egg, 

 the broader end downward. 



