INTRODUCTORY LESSONS. 



Xlll 



which becomes reniform if the apex, is rounded, etc. Obovate ; Oblance- 

 olate ; Obcordate, etc., apply to forms the reverse of ovate, lanceolate, etc. 



27 



28 



31 



32 



20 30 



FORMS OF LEAVES. 2/5. Lanceolate. 28- Oblanceolate. 27- Rpahilate. 28 

 shaped). 29. Cordite (Heart-shaped). 30- Reniform [Kidney-shaped). 31. 

 shaped. 32- Hastate (Spear-shaped) . 32a. Auriculate (Eared) base. 



26. Apexes of Leaves. There are terms descriptive of the 

 upper ends) of leaves. Fig. 18 has a Cuspidate apex; Fig. 19, 

 Emarginate; Figures 23, 24, 29, Acute; Fig. 25, Acuminate; 1^ 

 Obtuse. 



27. Margins of Leaves. All these forms are represented as havi 





33 34 35 36 



LEAF MARGINS. 33. Serrate. 34- Dentate. 35- Crenate. 

 39. Erose. 



37 38 39 



!. Wavy. 37. Sinuate. 38. Incised. 



entire or nearly entire margins, but the margins may be notched or cut 

 in various ways. Figures 33 to 39 will assist you in describing the mar- 

 gins of your leaves. Here, also, you will find it necessary to combine ad- 



