INTRODUCTORY LESSONS. 



which becomes reniform if the apex, is rounded, etc. Ohovale ; Ohlance- 

 olate ; Ohcordale, etc., appl}' to forms the reverse of ovate, lauceohite, etc. 



23 26 27 28 29 30 31 32 33a 



Forms of Leaves.— 25. Lanceolate. 26. Oolanceolate. 27. Spatulate. 28. Ovate (Egg- 

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

 Bhaped'. 3 2. Hastate (Spear-shaped) . 32a. Auriculate (Eared) baee. 



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. 26, 

 Obtuse. 



Margins of Leaves. All these forms are .represented r.s having 



Leaf Margixs.— 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 you in describing the mar- 

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



