THE FLOWERING PLANTS 
297 
Lily Family. — Lilies have parallel-veined leaves. The 
flowers are made up of a six-parted perianth (calyx and 
corolla taken together), six stamens, 
and a three-parted pistil. The fruit is 
a capsule. Lilies are cultivated chiefly 
for decorative purposes. 
Walnut Family. — The trees of this 
family furnish us with nuts and valu¬ 
able lumber. The monoecious flowers 
(see page 204) are grouped in catkins. 
The leaves are alternate and pinnately 
compound (see page 277). All the 
walnuts and hickories belong to this 
very useful family (Figure 272). 
Beech Family. — Like the walnut 
family, this group consists of trees, of 
which the beech, oak, and chestnut are 
the most common. All are valuable 
for lumber and firewood. The leaves 
are simple, alternate, and straight- 
veined. The flowers are monoecious. 
Crowfoot Family .— 
This large family is val¬ 
uable to us for the medi¬ 
cines (mostly poisonous) 
which it furnishes. The 
Figure 274. — Siliques 
of White Mustard. 
medicinal members of this family are hydras- 
tis, aconite, hellebore, and larkspur; while 
other members, as clematis, peony, and colum¬ 
bine, are cultivated for ornament. The com¬ 
mon buttercup shows most of the character¬ 
istics of the crowfoot family. The leaves are 
commonly dissected; the petals, sepals, and 
pistil are all disconnected (see page 198). The juice of the 
buttercup is colorless and is biting to the taste. 
Figure 275. — 
Single Silique 
Split Open. 
