88 THE LEAF. 
10. Zlastate (halbert-shaped), hollowed out at the base and 
sides. Ex. Bitter-sweet. 
11. Sagitttate (arrow-shaped), with pointed, descending lobes 
at base. Ex. Polygonum sagittatum; Sagittaria; dc. 
12. Reniform (kidney-shaped), broad, rounded at the apex, 
and hollowed at the base, as in the Asarum Canadense. 
a. The following forms depend less upon the proportion of 
the veinlets than on the imperfect development of the tissue 
between them. 
FIG. 30.—12—16, figures of feather-veined leaves, the remainder of radiate-veined. 
13. Runcinate (re-uncinate), having the margin extended at 
.the veins into pointed segments, which curve backwards. Ex. 
Taraxacum. 
14. Lyrate (lyre-shaped), with several deep, rounded sinuses, 
occasioned by deficiency of tissue between the lower veinlets ; 
water-cress (Sisymbrium). 
15. Pinnatifid (feather-cleft), with deep sinuses between the 
veinlets, separating each margin of the leaf into oblong, par- 
allel segments. Ex. Lepidium. . 
16. Stnuate, having deep, rounded openings between the 
veinlets, seen in the leaves of the white oak. | 
_233. RapiaTE-VEINED leaves assume many forms, depending 
upon the direction of the veins, and the quantity of the inter- 
vening tissue. Some of them are the following. 
17. Palmate (palm-shaped), having five lobes, with as many 
veins (227) separated by deep divisions, so as to resemble the 
palm of the hand with the fingers. Ex. passion-flower. 
