Northern Prairie Wildlife Research Center
Fringed Loosestrife (Lysimachia ciliata)
- Family: Primrose (Primulaceae)
- Flowering: May-July.
- Field Marks: This species is distinguished by its leaves that are rounded or heart-shaped at the base and by its ciliate leaf stalks.
- Habitat: Low woods, wet prairies, along streams, around ponds, damp thickets.
- Habit: Perennial herb with slender rhizomes.
- Stems: Erect, branched or unbranched, usually smooth, up to 3 feet tall.
- Leaves: Opposite, simple, ovate to ovate-lanceolate, pointed at the tip, rounded or heart-shaped at the base, without teeth, usually smooth, up to 4 1/2 inches long, up to 1 1/2 inches broad; leaf stalks conspicuously ciliate.
- Flowers: Several on long stalks from the axils of the uppermost leaves, yellow.
- Sepals: 5, green, nearly free from each other, lanceolate, up to 2/5 inch long.
- Petals: 5, yellow, short-pointed at the tip, nearly free from each other, up to 3/5 inch long.
- Stamens: 5, not attached to the petals.
- Pistils: Ovary superior, smooth.
- Fruits: Capsules up to 1/2 inch long, smooth.
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