Northern Prairie Wildlife Research Center
Southern Wetland Flora
Field Office Guide to Plant Species
Hydrocotyle umbellata L.
- Family: Carrot (Apiaceae)
- Flowering: April-September
- Field Marks: This penny-wort differs from all others by its peltate leaves and the flowers borne
in simple, not compound, umbels.
- Habitat: In shallow streams, along shores, wet ditches, swamps, seepage areas.
- Habit: Perennial herb with underground branches bearing small tubers.
- Stems: Creeping along as well as below the ground, rooting at the nodes, smooth, up to several
- Leaves: Arising singly from the nodes on upright stalks, peltate, nearly circular, sometimes
heart-shaped, with 7-11 low, rounded lobes, up to 2 inches across; leaf stalks up to 1 inch long.
- Flowers: Several in a simple umbel, borne on long, slender, upright, leafless stalks up to 6 inches
- Sepals: 5, very tiny, united below, green.
- Petals: 5, white, free from each other, up to 1/12 inch long.
- Stamens: 5.
- Pistils: Ovary inferior.
- Fruits: Flattened, more or less kidney-shaped, notched at the top, up to 1/10 inch across.
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