LEAVES 
133 
these veins parallel? Hold the leaf up towards the light and see 
how the main veius are connected by smaller veiniets. 
OTD 
(Lith 
Le ize 
CEN 
el ee: 
XA 
oe 
ystcti ts 
sis 
eS 
ore 
Sy 
1 \ 
Ty 
Ay 
Mi 
JX 
xs 
v7 
z] = 
a, 
7 
wi. 
SEP 
(aanSar f @ 
ta Ly OY (} 
i) Q 4 M. wD 
uetiaasst aeesarece 
BELO ot NY 
m, 
y 
a 
a, 
fa 
y 
a 
Fie. 94. —Netted Vein- 
ing (pinnate) in the 
Leaf of the Foxglove. 
Examine 
with your glass the leaf as held to the light 
and make a careful sketch of portions of 
one or ‘two veins and the intersecting vein- 
lets. 
How is the course of the veins shown 
on the upper surface of the leaf ? 
Examine both surfaces of the leaf with 
the glass and look for hairs distributed on 
the surfaces. 
Describe the manner in which 
the hairs are arranged. 
The various forms of leaves are 
classed and described by botanists with 
great minuteness,! not simply for the 
study of leaves themselves, but also 
because in classifying and describing 
plants the characteristic forms of the 
leaves of many kinds of plants form 
a very simple 
and ready 
means of distinguishing them 
from each other and identifying 
them. 
The student is not ex- 
pected to learn the names of the 
several shapes of leaves as a 
whole or of their bases, tips, or 
margins, except in those cases 
in which he needs to use and 
apply them. 
anes as 
Se 
Fic. 95.— Netted Veining (pal- 
mate) in Leaf of Melon. 
Many of the words used to describe the shapes of leaves 
are equally applicable to the leaf-like parts of flowers. 
1 See Kerner and Oliver’s Natural History of Plants, Vol. I, pp. 623-637. 
