INTRODUCTORY LKSSONS. 



XVll 



wbicli becomes reuiform if the apex, is rounded, etc. Ohovatr. ; Ohlance- 

 olatc ; Obcordalc, etc., apply to forms the reverse of ovate, lanceolate, etc. 



25 26 27 28 29 30 31 32 33s 



Forms of Lewes— fj'i. Lanceolate. 26. Oblanceolate. 27. Spatiilate. 28. Ovate (Eggk 

 ■hapert). 29- Cordate (Heart-shaped). 30- Keniform (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 

 Ui^x^ei ends) of leaves. Fig-. 18 has a Cuspidate apex; Fig. 19, Notched or 

 Emarginate ; Figures 23, 24, 29, Acute; Fig. 25, Acuminate; Fig. 26^ 

 Obtu. e 



3Iargins of Leaves. All these forms are represented as having 



Lkaf >TAR<JiNe.— 33. Serrate. 34. Dentate. 35. Crenate. 36- Wavy. 37. Sinuate. 38. Incised 

 S9. 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- 



