INTRODUCTOnY LESSONS. 



Xlll 



wbicli becomes reniform if the apex, is rounded, etc. Ohovate ; Oblance- 

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



2.) 2G 27 28 29 30 31 32 33a 



Forms of Leaves. — 25. Lanceolate. 23. Oblanceolate. 27- Sp.Vnlr.te. 28. Ovato (Egg- 

 Fhapeil). 29. Conlato (Hoart-sbapt'dj . 30. Keuifonn (Kirliioy-shapetl) . 31. Falcate (Siclile- 

 ghapeil'. 32. Hastate (Si)ear-sbaped) . 32a. Auriculate (Eared) base. 



26. Apexes of Leaves. There are terms descrij)tive of the apexes (the 

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

 Emarginate ; Figures 23, 2-4, 29, Acute; Fig. 25, Acuminate; Fig. 26, 

 Obtuse. 



27. Margins of Leaves. All these forms are repre.sented as having 



Leaf ^Margins.— 33. Serrate. 34. Dentate. 35. Crenate. 36. 'V^'avy. 37. Sinuate. 38. Incised. 

 39. Erose. 



entire or nearly entire margins, hut 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- 



