INTRODUCTORY LESSONS. 



wbicb becomes reniform if the apex, is rounded, etc. Ohovalf- ; Oblance- 

 clate ; Ohcordate, etc., apply to forms the reverse of ovate, lanceolate, etc. 



25 26 



Forms of Leaves. — STi. Lanceolate. 26. Oblanceolate. 27- Spatulate. 28. Ovate (Egg- 

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

 •hapedi. 32. Hastate (Spiar-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. 2^, Acuminate; Fig. 2G, 

 Obtuse. 



Margins of Leaves. All these forms are represented as having 



33 34 35 36 37 38 39 



Lfaf Margins.— 33. Serrate. 34. Dentate. 35. Crenate. 36. Wavy. 3T. S.nuate. 38. Incised. 

 39. Erose. 



entire or nearly entire margins, but the margins may l)e notched or cut 

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

 giiis of your leaves. Here, also, you will find it neces.sary to combine ad- 



