Northern Prairie Wildlife Research Center
Moistbank Pimpernel (Lindernia dubia)
- Family: Figwort (Scrophulariaceae)
- Flowering: June-October.
- Field Marks: The genus Lindernia differs from the similar genus Gratiola by lacking the pair of tiny bracts near the calyx. The moistbank pimpernel differs from other Lindernias by the stalks of the lowermost flowers shorter than their subtending leaves.
- Habitat: Around ponds and lakes, wet ditches, along streams, marshes, low woods.
- Habit: Erect or sprawling annual herb with fibrous roots.
- Stems: Mostly spreading, much branched, up to 10 inches long.
- Leaves: Opposite, simple, oblanceolate to elliptic, more or less pointed at the tip, tapering to the base, with or without a few teeth, smooth, up to 1 inch long.
- Flowers: Solitary in the axils of the leaves, white to pale lavender, the lowermost flower stalks shorter than their subtending leaves.
- Sepals: 5, green, free, or nearly so.
- Petals: 5, somewhat 2-lipped, white to pale lavender, less than 1/2 inch long.
- Stamens: 4, only 2 of them fertile.
- Pistils: Ovary superior.
- Fruits: Capsules ovoid, smooth, 1/4-1/5 inch long, with many seeds.
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