HOW TO USE THE POPULAR FLORA. 
104* 
328. With plants in hand, turn to p. 105, and compare with the distinguishing 
marks of Class I. A slice across the stem shows no ring of wood around a pith. 
The leaves are not netted-veined. The parts of the flower are not in flves or fours, 
but in sixes, that is, twice threes. So the plant does not agree with Class I. in 
any respect. Turn therefore to Class II., on p. 203. Examining slices of the stem 
with a magnifying-glass, you may find threads of wood interspersed in the cellular 
part or pith. The leaves are parallel-veined (Fig. 502, 503). The flowers have 
their parts in threes or twice threes ; i. e. the cup of the blossom has six lobes, 
and there are six stamens ; and, although there is only one pistil, the stigma is 
three-lobed and the ovary has three cells, showing that it is composed of three 
pistils grown into one. So, without looking for the embryo in a ripe seed, which 
is not often to be had, you are sure the plant belongs to Class II. End o gens or 
Monocotyledons. 
329. To find out the family or order the plant belongs to, try the Key. There 
are three divisions of the class. First, the Spccdiceous , which has the flowers ses- 
sile on a spadix or fleshy axis. Not so with the plant in hand, which has drooping 
blossoms in a slender raceme. Pass on, therefore, to the second or Petaloideous 
division. In this the flowers are not on a spadix, nor enclosed in chaffy bracts or 
glumes, and they have a calyx and corolla, or a perianth colored like a corolla. 
Our plant belongs to this division. The first line under it reads : 44 Perianth free from 
the ovary ” ; this is the case in our plant. Proceed to the next rank : 44 Of 3 green 
or greenish sepals and 3 distinct and colored petals.” Not so in our plant ; so we 
pass to the corresponding line : 44 Of 6 petal-like leaves in two ranks, or 6-lobed and 
all colored alike.” Here our plant belongs. Proceed to the two lines under this, 
beginning with the word 44 Stamens.” Our flowers have six stamens ; so we take the 
second line of the pair. Pass to the two lines of the next rank, beginning with 
44 Anthers.” These in our plant are turned inwards: so we take the second line of 
the pair, and are led to the Lily Family, p. 209. Turn to that page : read over the 
marks of the family, and go on to ascertain the genus. Having few seeds or ovules 
in the ovary, small flowers, and running rootstocks, we find our plant to agree with 
the first line of the key to the genera of the Lily Family. The simple and naked 
scape or flower-stalk from the ground, &c. accords with the third line of the next 
rank ; and the flowers in a raceme answer to the first of the two lines under that. 
And this brings us to the name of the genus, viz. in Latin form, Convallaria / in 
English, Lily of the Yalley, — the only species of the genus. 
