. Elementary botany. Botany. 266 D ICO T YLED ONS. flowers have four small sepals and four stamens. The fertile flowers (pistil- late) have also four sepals. The pistil has a two-loculed ovary; one of the locules is the smaller, and later disappears, so that the fruit is a one-seeded achene. The parts of the flower are in twos, since the four sepals are in two pairs. 515. Lesson VI. The elm family (ulmacege).—The elm tree belongs to this family. The leaves of our American elm (Ulmus americana) are ovate, pointed, deeply serrate, and with an ob- lique base as shown in fig. 347. The narrow stipu
. Elementary botany. Botany. 266 D ICO T YLED ONS. flowers have four small sepals and four stamens. The fertile flowers (pistil- late) have also four sepals. The pistil has a two-loculed ovary; one of the locules is the smaller, and later disappears, so that the fruit is a one-seeded achene. The parts of the flower are in twos, since the four sepals are in two pairs. 515. Lesson VI. The elm family (ulmacege).—The elm tree belongs to this family. The leaves of our American elm (Ulmus americana) are ovate, pointed, deeply serrate, and with an ob- lique base as shown in fig. 347. The narrow stipules which are. Fig- 347- Spray of leaves and flowers of the American elm ; at the left above is section of flower, next is winged seed (a samara). present when the leaves first come from the bud soon fall away. The flowers are in lateral clusters, which arise from the axils of the leaves, and appear in the spring before the leaves. They hang by long pedicels, and the petals are absent. The calyx is bell-shaped, and 4-9-clett on the margin. The stamens vary also in number in about the same proportion. A section of the flower in fig. 347 shows the arrangement of the parts, the ovary in the center. The ovary has cat her one or two locules, and two styles. The mature fruit lias one locule, and is margined with two winged expansions as shown in the figure. 'This kind of a seed is a Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Atkinson, George Francis, 1854-1918. New York, H. Holt and company
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