rSTKODUCTOBI LESSONS. 



xvu 



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

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



25 26 27 28 29 . 30 31 32 33a 



Forms of Leaves. — 35. Lanceolate. 26' Oblanceolate. 27- Spatulate. 28. Ovate (Egg. 

 Ehaped). 29. Cordate (Heart-shapedJ . 30- Beniform (Eidney-shaped) . 31. Falcate (Sickle* 

 ghaped'. 32. Hastate (Spear-Bhaped) . 32a. Auriculate (Eared) base. 



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

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

 Ema-- ginnie ; Figures 23, 24, 29, Acute; Fig. 25, Acuminate; Fig. 26, 

 Obtu. e 



JIargins of Leaves. All these forms are represented as having 



33 34 35 36 37 38 



LeafMakgins-— 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 89 will assist you in describing the mar- 

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



