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Aquatic and Wetland Vascular Plants of the Northern Great Plains

Clusiaceae - The Mangosteen Family

Perennial and annual glabrous herbs (in those included here), usually simple below, branched above in the inflorescence. Leaves simple, opposite, sessile and often clasping at the base, glandular-punctate with brown or black glands, especially beneath. Flowers few to many in terminal cymes or clusters, or some also in lateral clusters from the upper axils, perfect, regular; sepals 5; petals 5, yellow or pink to greenish or purplish; stamens 9-35, free or united below by their filaments into 3 or more fascicles; pistil 3-carpellary, styles 3, ovary superior, maturing as a 3-valved, many-seeded capsule.

Lead Characteristic Go To
1 Petals yellow; stamens 15-35, free. Genus Hypericum
1 Petals pink to greenish or purplish; stamens 9(12), fascicled in 3 groups. Genus Triadenum

17. Clusiaceae, the Mangosteen Family
1. Hypericum L. -- St. John's-wort
1. Hypericum majus (A. Gray) Britt. -- Greater St. John's-wort
2. Triadenum Raf. -- Marsh St. John's-wort
1. Triadenum fraseri (Spach) Gl.

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