XVI 



INTEODUCTOKY LESSONS. 



tliere is usually a bud, or brauch, or a flower at tlie base of a leaf be- 

 tween it aud the stem from which it grows. 



Buds and flowers at the ends of stems or branches, are Terminal ; 

 when between the stems and leaves, Axillary. 



Examine the leaf of a Yiolet or Pansy. You can readily distin- 

 guish three parts: A broad Blade ; a stem or Petiole, and a j^air of appen- 

 dages at the base of the j^etiole called Stipules. The latter in the Pansy 

 are leaf-like. Sometimes they are mere scales, aud frequently there are 

 none at all. The petiole may be wanting, also; the leaf is then said to 

 be Sessile. Leaves with but one blade are — 



Simple Leaves. The illustrations (Figures 18 to 32) show the 

 princi23al forms of simple leaves or leaflets of compound leaves. Care- 

 fully compare the blades of your leaves with these shapes. If the leaf 

 in hand does not correspond with any of the figures, you ma}" describe it 

 by combining the descriptive words, or hj adding a word. A leaf, for 

 examj^le, too broad to be lanceolate, and narrower than ovate, if about 

 half way between the two forms, is Ovate-lanceolate or Lance-ovate; the 

 first, if nearer ovate; the latter, if nearer lanceolate. Or, if merely a lit- 

 tle broader than lanceolate, we may say it is Broadly-lanceolate ; when more 

 slender. Narrowly-lanceolate ; if slender and nearly as broad in the middle 

 as nearer the base, it is Linear-lanceolate, etc. So, too, there are iuterme- 



18 19 



Forms of Leavfs. — 18 



20 21 



Linear. 1 9 

 Hastate ( Spear-shapedj 



22 23 24 



Oblong. 20. EUipticaL 21- Orbicular. 22- Peltate 

 Sagittate (Arrow-sliaped). 



(Shield-shaped). 28. Hastate (Spear-shapedj. 24- 



diate forms described by such terms as : Oblong-lanceolate ; Narrowly-ellip- 

 tical; Broadly-elliptical — which approaches orbicular; Broadly-cordate — 



