. Elementary botany. Botany. 28o DICO T YLED ONS. Topic VU: Dicotyledons with distinct petals and epigynous flowers. MYRTIFLOR^. 536. Lesson XV. The evening-primrose family (onogra- ceae).—In the evening primrose (cenothera) the flowers are ar- ranged in a loose spike along the end of the stem, each one situated in the axil of a leaf- like bract. The flowers of the family are very characteristic, as shown here. They are sessile in the axil of the bract, and the calyx forms a long tube by the union of the sepals, only the end of the tube being divided into the individual parts, showing four lob
. Elementary botany. Botany. 28o DICO T YLED ONS. Topic VU: Dicotyledons with distinct petals and epigynous flowers. MYRTIFLOR^. 536. Lesson XV. The evening-primrose family (onogra- ceae).—In the evening primrose (cenothera) the flowers are ar- ranged in a loose spike along the end of the stem, each one situated in the axil of a leaf- like bract. The flowers of the family are very characteristic, as shown here. They are sessile in the axil of the bract, and the calyx forms a long tube by the union of the sepals, only the end of the tube being divided into the individual parts, showing four lobes. On the edge of the open end of the calyx tube are seated the four, somewhat heart- shaped, yellowish petals, and here are also seated the eight stamens. The four carpels are united into a single pistil within the base of the calyx tube and united with it, so that the calyx tube seems to be on the end of the pistil. The flowers soon fade and fall away from the pistil, and this grows into an elongated four-angled pod. Since the lower flowers on the stem are the older, we find nearly mature fruit and fresh flowers, with all intermediate grades, on the same plant. The plants grow by roadsides and in old fields. They are from \ocm to a meter or more high (one to five feet). The leaves are. Fig. 371. Section of flower of Qlno^ 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
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