68 



150 



FORM OB FlatTRX. 

 149 UT 



Palmate-veined leaves. 147, Menisperraum Canadense. 148, Passiflora cerulea. 149, Bron»- 

 eonetia papyrifera. 150, Oak gei-anium. 



Loaves are palmately cleft and palmately parted, according to the 

 depth of the incisions as above described. But the most peculiar modi- 

 153 151 152 flcation is 



273. The pedate, lite a bird's foot, 

 having the lowest pair of veinlets enlarged, 

 recurved, and bearing each several of the 

 segments (148). 



274. The forms of the parallel- 

 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 com- 

 mon form is 



275. 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 veinlets 

 are all equally shortened. The ensiform, 

 or sword-shaped, is also linear, but has its 

 edges vertical, that is, directed upward and 

 downward. 



276. If the veins curve, we may have 

 the lanceolate, elliptical, or even orbicular 

 forms; and if the lower curve, downward) 

 the cordate, sagittate, etc., all of which are 

 shown in the cuts. 



The palmate or radiate form is finely illustrated 

 in the , palmetto and other palms, whose large, 

 fan-shaped leaves are appropriately termed flabd- 

 li/orm (fan-shaped). 



277. The leaves op the pine and the pir tribe (Coniferse) gen- 

 erally are parallel-veined also, and remarkable for their contracted 



151, Ensifni'm leaves of iris. 

 152, AcerosB leaves of PJnus. 153, 

 Snbnlato leaves of Jiiniperus com- 

 munis. 



