INTRODUCTORY LESSONS. 



XV11 



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

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



32 



33a 



FOKMS OF LEAVES. 25. Lanceolate. 23- Oblanceolate. 27. Ppahilate. 28. Ovate (Egg. 

 shaped). 29. Cordate (Heart-shaped). 30. Reniform (Kidney-shaped). 31. Falcate (Sickle- 

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



Apexes of Leaves. There are terms descriptive of the apexes (the 

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

 Emarginate ; Figures 23, 24, 29, Acute; Fig. 25, Acuminate; Fig. 2G, 

 Obtuse. 



Margins of Leaves. All these forms are represented as having 



T.F.AF MARGINS. 33. Serrate. 34. Dentate. 35. Crenate. 36. Wavy. 37. Sinuate. 38. Incised. 

 39. Erose. 



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

 in various ways. Figures 33 to 39 will assist 3*011 in describing the mar- 

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



