Northern Prairie Wildlife Research Center Western Wetland Flora
Field Office Guide to Plant Species Trollius laxus Salisb. -
Family: Butter-cup (Ranunculaceae) - Flowering: June-August -
Field Marks: This species is readily recognized by its large
solitary flower with large sepals and smaller petals and by its
deeply palmately lobed leaves. - Habitat: Swamps, wet woods,
along streams, wet meadows, particularly in the mountains. -
Habit: Perennial herb with thick, fibrous roots. - Stems:
Upright, slender, up to 1 1/2 feet tall, smooth. - Leaves:
Alternate, palmately 5-lobed, up to 8 inches long and broad, the
lobes coarsely toothed or partly divided again, smooth, the
basal leaves on long stalks, the 1 or 2 cauline leaves on short
stalks or sessile. - Flowers: Solitary, up to 2 1/2 inches
across, showy, usually whitish or greenish yellow. - Sepals:
Usually 5, free from each other, petal-like, white or greenish
yellow, up to 1 inch long. - Petals: Usually 5, free from each
other, up to 1/4 inch long, each with