OF LEAVES. 



a mid-rib witli some lateral divisions, you have, as at 6, the repre- 

 sentation of an ovate leaf. If the petiole were jilaced at the narrow- 

 est end, it would be an cbovate leaf. An ocal leaf (c,) is when both 

 tlie ends are of equal breadth. When the length is much greater 

 than the breadth, the leaf is said to be elliptical, as at d. 



Fig. 40 Lanceolate : this 



kind of leaf may be 

 seen in the peach- 

 tree ; it is represent- 

 ed at Fig. 40, a ; this 

 is acuminate, with a 

 serrulated or slightly 

 notched margin; al 

 6, may be seen the 

 cleft stipules or ap- 

 pendages of the leaf. 

 Linear^ as the 

 grasses and Indian 

 corn ; Fig. 40, c, re- 

 presents a leaf of this 

 kind ; it is sheathing, 

 or encloses the stem 

 by its base, as may 

 be seen at d. 



Deltoid, from the Greek letter, delta A ; this kind of leaf is repre- 

 sented ai e, Fig. 40; the Lombardy poplar affords an example of the 

 same. 



^'^•4^- Sagittate (from 



sagitta an arrow,) 

 or arrow-shaped 

 leaf; this is repre- 

 sented at a, Fig. 41 ; 

 the Sagittaria, an 

 aquatic plant, af- 

 fords an example of 

 this leaf 



.if^erose, or needle- 

 shaped ; this is re- 

 presented at b, Fig. 

 41. Leaves of this 

 kind are mostly 

 clustered together, 

 as in the pine ; they 

 are subulate, or 

 pointed like a shoe- 

 maker's awl ; they 

 are rigid and ever- 

 green. 



Trees with ace- 

 -ose leaves, are 

 usually natives of 

 mountainous or northern regions; any other kind of leaves would, 

 in these situations, be overpowered by the weight of snow, or the 

 violence of tempests; but these admit the snow and wind ihrougli 



Elliptical— Lanceolate— Linear- Sagittate— Acerose. 



