FORMS OF SIMPLE LEAVES. 



Awned aristate (from the Latin, arista, a beard of wheat), 

 when it terminates in a long, hard bristle or beard. 



An acuminate leaf 

 folium acuminatum 

 1g. 25). -(From the 

 itin, acumen, a point.) 

 It has an extended ter- 

 mination, and in this 

 r . 25. ACUMINATE. respect differs from the 



lanceolate leaf. 

 The Cornus alternifolia and reed are examples. 

 This figure (25) and the following (26) show the primary 

 nerves, which arise directly from the petiole and midrib. 



A hastate leaf folium 

 hastatum (fg. 26). 

 (From the Latin, hasta, a 

 spear or halbert halbert- 

 shaped.) Triangular with 

 lobes projecting perpen- 

 dicularly to the petiole. 



The Polygonum hasta- 

 tum and bitter-sweet are 

 Fig. 26. HASTATE. . 



examples. 



This leaf is an instance of an angulinerve leaf. 



A sagittate leaf folium 



sagittatum (fig- 27). 

 (From the Latin, sagitta, 

 an arrow.) A leaf resem- 

 bling the head of an arrow : 

 the lobes at the base are 



Fig. 27. SAGITTATE. 



elongated, and scarcely diverging from the petiole. Example: 

 Polygonum sagittatum, called tear-thumb, and turkey-seed. 



A palmato-lobate leaf 

 folium palmato - lobatum 

 (fig. 28). (From the 

 Latin, palma, palm of the 

 hand.) Having lobes which 

 give it some resemblance 

 to the hand. This figure 

 illustrates a palminerve 

 leaf. 



Example: the Liquid- 

 ambar styracifera, called 

 Fig. 28. PALMATO-LOBATE. sweeUgum. 



