FORMS OF SIMPLE LEAVES. 



37 



A palmate leaf folium palmatum 

 (Jig- 29). Hand-shaped, divided nearly 

 to the insertion of the petiole into oblong 

 lobes of similar size, but leaving a space 

 entire like the palm of the hand. 



Examples : the Viola palmata, the pas- 

 sion flower, and castor-oil plant ; also, the 

 red and sugar mapJes. 



A trilobate leaf folium 

 trilobatum (Jig. 30). 

 (From the Latin, tres, three.) 

 A leaf formed of three lobes, 

 the margins of which are 

 rounded. 



A , lyrate leaf folium 

 lyratum (f,g. 31). (From 

 the Latin, Z/ro, a lyre.) A 

 leaf supposed to resemble the 

 shape of a lyre. It is cut 

 into several transverse seg- 

 ments, gradually larger to- 

 wards the extremity of the 

 Ieaf,which is rounded,as in the 

 Salvia lyrata, Lyre-leaved 

 sage, and garden radish. 



A sinuate, or sinuose leaf 

 folium sinuatum (Jig. 32). 

 A leaf having deep fissures or 

 sinuses. Bending in and out. 

 (Sinus: the bays or recesses 

 formed by the lobes of leaves or 

 other bodies, are so called.) 



Example : the Argemone 

 mexicana. 



Fig. 29. PALMATE. 



Fig. 30. TRILOBATK. 



Fig. 31. LYRATE. 



Fig. 32. SINUATE. 



