158 VARIETIES OF VENATION. 
divisions or primary branches of the midrib, or of the separate 
ribs, are commonly called veins ; and their smaller ramifications 
veunlets. 
There are two marked modifications of venation. In the 
Fic. 308. Fre. 310; 
Fie. 311. 
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Fig. 308. Leaf of the Cherry with lamina, petiole, and stipules. The lamina 
has serrate margins, and a large central vein or midrib is seen to proceed 
from the petiole to the apex of the leaf, and to give off from its sides the 
other veins (vinnately-veined ).—Fiig. 309. Ribbed leaf of Cimnamon with 
entire margins. Fig. 310. Leaf of the Melon with dentate margins, 
The venation is said to be radiated or palmately-veined.—/Fig. 311. a. 
Parallel venation of a grass; this variety of venation is commonly called 
straight-veined. 6. A variety of parallel yenation sometimes termed 
curve-veined, as seen in the Banana, 
first modification the fibro-vascular tissue as it enters the lamina 
is either continued as the midrib (fig. 308), or it divides into 
two or more ribs (figs. 309 and 310); and from this midrib or 
ribs other veins are given off ; and from them, in like manner, 
