Northern Prairie Wildlife Research Center
Western Wetland Flora
Field Office Guide to Plant Species
Ranunculus flammula L.
- Family: Butter-cup (Ranunculaceae)
- Flowering: July-August
- Field Marks: This butter-cup has simple, toothless and unlobed, smooth leaves, stems that root at the nodes, and sepals up to 1/4 inch long.
- Habitat: Marshes, wet meadows.
- Habit: Sprawling perennial herb rooting at the nodes.
- Stems: Sprawling, rooting at the nodes, usually smooth, slender, up to 1 1/2 feet long.
- Leaves: Simple, often clustered at the rooting nodes, narrowly spatulate to oblanceolate, up to 2 1/2 inches long, up to 1/3 inch wide, pointed at the tip, tapering to the base, smooth or nearly so, without teeth or lobes.
- Flowers: 1-few clustered at the rooting nodes, on stalks up to 3 inches long.
- Sepals: 5, greenish yellow, free from each other, up to 1/4 inch long, sometimes turned downward.
- Petals: 5 or 10, bright yellow, free from each other, a little longer than the sepals.
- Stamens: 20-30.
- Pistils: Many in a rounded head, each with a superior ovary.
- Fruits: Achenes 10-25, clustered in a rounded head, each achene up to 1/16 inch long,
with a short, curved beak.
- Notes: The achenes are eaten by waterfowl.
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