99, 100.] 



MORPHOLOGY OF THE LEAF. 



117 



Palmate-veined leaves. 347, Menispermum Canadense. 348, Passiflora cerulea. 349, Broussonetia pa- 

 pyrifera. 350, Oak Geranium. 



palmately cleft and palmately parted, according to the 



depth of the incisions as above described. But the 



most peculiar modification is the 



Pedate, like a bird's .foot, having 



the lowest pair of veins enlarged, 



recurved, and bearing each several 



of the segments (348). 



297. The forms of the paral- 

 lel-veined leaves are remarkable 

 for their even, flowing outlines, 

 diversified solely by the direction 

 and curvature of the veins. When 

 the veins are straight, the most 

 common form is the Linear, long 

 and narrow, with parallel margins, 

 like the leaves of the Grasses a 

 form which may also occur in the 

 pinnate-veined leaf, when the vein- 

 lets are all equally shortened. The 

 ensiform, or sword-shaped, is also 

 linear, but has its edges vertical, 

 that is, directed upward and down- 



Asm ~r*r\ 



298. If the veins curve, we may have the lanceolate, 



f Juniperus communis. 



