PARALLEL-VEINED LEAVES. 



89 



18. Digitate (finger-shaped), having narrower and deeper 

 segments than the palmate, as in the hemp. 



19. Pedate (fooc-shaped). The same as palmate, except that 

 the two lateral lobes are themselves subdivided, as in the 

 peony and passion-flower. 



20. Laciniate (gashed), the veins and veinlets separate, as if 

 the blade were cut and gashed with scissors. Ex. Ranunculus. 



21. Peltate (shield-like), the veins radiating in all directions, 

 and all connected by intervening tissue. This form is gener- 

 ally also orbicular, and appears to result from the union of the 

 base-lobes. Ex. Podophyllum peltatum, Tropeolum, Brasenia. 



22. Reniform, broad-ovate, broad- cor date, &c., may also result 

 from the radiate veining. 



234. The form of parallel-veined leaves is less diversified 

 than that of the preceding classes, being 



23. Linear, when the veins (and fibres) are straight, as in the 

 grasses. This form may also occur m the feather-veined leaf 

 by an equal development of all the veinlets as in Linaria \t.i1- 

 garis, &c. 



FIG. 31. —23, 24, 25, figures of leaves with parallel veins ; 2 — 10, margins of leaves. 



24. Oval, lanceolate, oblong, or some Idndred form, when the 

 veins are ciu-vcd, as in Carex, Cypripedium, Orchis, &c., or it 

 may be 



25. Cordate, when some of the lower veins are curved back- 

 wards Hud then upwards, as in Pontaderia, and even sagittate, 

 when they are directed downwards at the base, as in the Sagit- 

 taria. 



