INTRODUCTORY LESSONS. 



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wbicli becomes reniform if the a^^ex, is rounded, etc. Ohovate ; Ohlance- 

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



23 26 27 28 29 30 31 32 33a 



Forms of Leaves.— .g,*!. Lanceolate. 23. Oblanceolate. 27- Spahilate. 28. Ovate (Egg- 

 Bhaped). 9.<i. Cord :te (Heart-shaped). 30- Reniform (Kidm-y-sliaped) . 31. Falcate (Sickla- 

 Bhaped'. 32. Hastate (Spc-ar-sliaped) . 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. 26, 

 Obtuse. 



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



LkafMargins.— 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 yon in describing the mar- 

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



