IN-TEODUCTORY LESSONS. 



there is usually a bud, or branch, or a flower at the base of a leaf bie- 

 tween it and the stem from which it grows. 



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

 when between the stems and leaves, Axillary. 



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

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

 dages at the base of the petiole called Stipules. The latter in the Pansy 

 are leaf-like. Sometimes they are mere scales, and 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 — • 



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

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

 fully comi^are the blades of your leaves with these shapes. If the leaf 

 in hand does not corresj^ond with any of the figures, you may describe it 

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

 example, 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 interme- 



24 

 22. Peltate 



18 19 20 21 22 23 



ToEMa OF Leaves.— 18. Linear. 19. Oblong. 20. Klliptical. 21. Orbicular. 

 (SUeld-shapedl . 23. Hastate (Spear-shaped). 24. Sagittate (Arrow-shaped). 



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

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



