Northern Prairie Wildlife Research Center
Stalked Water Horehound (Lycopus rubellus)
- Family: Mint (Lamiaceae)
- Flowering: July-September.
- Field Marks: The distinguishing characters of this Lycopus are the sharp-pointed sepals and the unlobed leaves with small teeth.
- Habitat: Low woods, swamps, in sloughs, along streams, around ponds and lakes.
- Habit: Perennial herb with tuberous roots.
- Stems: Erect, unbranched, smooth, 4-sided, up to 1 foot tall.
- Leaves: Opposite, simple, lanceolate to elliptic, toothed, not lobed, smooth, up to 3 inches long.
- Flowers: Several crowded in the axils of the leaves, white, up to 1/4 inch long.
- Sepals: 5, green, united below, the lobes sharp-pointed, about 1/10 inch long.
- Petals: Apparently 4, white, united below to form a short tube.
- Stamens: 2.
- Pistils: Ovary superior, 4-parted.
- Fruits: Nutlets about 1/12 inch long.
- Notes: The fleshy roots are eaten by muskrats, the nutlets are eaten by waterfowl.
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