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Members of the Phlox family are usually small plants with narrow, alternate or opposite leaves. They are adapted to arid environments, especially in the western states. A few species take the form of shrubs or trees in other parts of the world. The delicate flowers are regular and bisexual, usually forming a tube at the base and flattening out to form a dish-like face. There are 5 united sepals, but they may appear mostly separate. There are 5 united petals, usually twisted in the bud stage. There are 5 stamens attached to the corolla and alternate with the petals. (In a few species there are 4 sepals, petals and stamens.) The ovary is positioned superior. It consists of 3 (sometimes 2 or 5) united carpels (syncarpous) with the partition walls usually present, forming an equal number of chambers. It matures as a capsule with 1 to numerous seeds.
Key Words: Five united petals forming tubular flowers with a flat face. Usually narrow leaves.
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