Northern Prairie Wildlife Research Center
Western Wetland Flora
Field Office Guide to Plant Species
Caltha leptosepala DC.
- Family: Butter-cup (Ranunculaceae)
- Flowering: June-August
- Field Marks: This species is identified by its large white 1 or 2 flowers and its undivided heart-shaped single leaves.
- Habitat: Wet meadows and bogs in the mountains.
- Habit: Perennial herb with thick fibrous roots.
- Stems: Upright, either bearing no leaves and one flower or 1 leaf and 2 flowers, up to 10 inches tall, smooth, somewhat succulent.
- Leaves: Basal or with only one on the stem, ovate to orbicular, up to 3 inches long,
rounded at the tip, deeply heart-shaped at the base, regularly toothed, smooth, on stalks.
- Flowers: Solitary or in pairs, up to 2 1/2 inches across, white.
- Sepals: 6-12, white, petal-like, free from each other, up to 1 inch long.
- Petals: 0.
- Stamens: Numerous.
- Pistils: Many, each with a superior ovary.
- Fruits: Follicles several, up to 1/2 inch long, containing very many seeds.
- Notes: This plant begins to flower after the first thaw in the spring. There is a report of this species from California.
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