ARRANGEMENT OF THE LEAVES. 35 
has its stipules adnate; that is, growing to the petiole. The 
Pansy has large stipules deeply cleft into many segments. 
47. Figs. 85-88 are very instructive. Fig. 88 is a 
Pear leat, with an ovate blade, a slender, cylindric petivle, 
and a pair of small, narrow stipules (s). Fig. 86 is a Knot- 
grass leaf, with an ochrea (s); that is, a pair of stipules so 
joined at the edges as to form a sheath around the stem 
Fig. 87 is a Grass leaf, linear, with a ligule (s) supposed to 
be the top of a doubled stipule. Fig. 85 is a very compound 
leaf of Conioselinum, having a broadly winged, sheathing 
petiole. 
LESSON IX. 
ARRANGEMENT OF LEAVES AND BUDS. 
48. Ir you carefully notice how the leaves are distributed 
over any plant,—the Corn plant, for example,—you will soon 
admire their order and exactness in this respect. At first 
view, we might suppose their positions all accidental; but it 
is not so, and much of the peculiar aspect of the plant de- 
pends upon this circumstance. 
49. In the Corn plant, or in this figure of Lady’s-slipper 
(89), we find the leaves alternate,—that is, one on this side, 
the next one higher and on that side, and so on. So it is in 
46. Stipules ; can you repeat the definition? Describe the stipules of the 
Rose. Describe the stipules of the Pansy. 
47. Describe the stipules of the Pear. Stipules of Knot-grass—what 
called? Stipules of Grass—what called ? 
48. Are the positions of the leaves on the plant accidental ? 
49. Can you describe the alternate arrangement? How is this arrange 
ment more accurately deseribed ? 
