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The plant is 15–90 cm (6–35 in) tall. The fern-like leaves are lobed and grouped in threes, growing from the base and off the flowering stems. The flowers are 1–2 in (2.5–5.1 cm) long and have yellow petals with a red spur and red sepals. They appear in late spring (usually in May and June), nodding on stems above the leaves.
Each flower stem is clasped by a leaf as it emerges from the ground. The flowers open when they are in sunlight and close at night. [10] They are pollinated by small bees and flies. Seeds develop in green pods 4 to 6 cm (1 + 1 ⁄ 2 to 2 + 1 ⁄ 4 in) long, and ripen before the foliage goes dormant.
The lateral leaflets of each stem leaf may be lobed, giving the appearance of five leaflets per leaf. Each leaflet is up to 5 cm (2.0 in) long, with serrate leaf margins (edges) and branched (not parallel) veins. The flower stalk rises directly from the leaf whorl. The solitary flower is 2–2.5 cm (0.8–1.0 in) across with 4–9 (usually 5 ...
The heart-shaped basal leaves have hairy stalks up to 20 cm (8 in) long. Both sides of the leaf blade have uniformly scattered hairs. The erect flowering stem is 15–40 cm (6–16 in) long, with a terminal raceme of 15–50 flowers. The flowers are white, small and feathery, giving the flower cluster a fuzzy appearance.
The leaves have green or purple tips on each tooth. [2] [3] [4] The basal leaves are often pinnately divided. Habit. The flowering period is between May and October in northern Europe, or between June and August in Minnesota. [5] The inflorescence is a lax raceme, terminal or arising from the leaf axil, up to 34 cm long with up to 42 flowers ...
An annual or short-lived perennial growing to a maximum of 2.5 metres (8.2 ft), it has erect purplish stems and rounded umbels of minuscule white or pale pink flowers in late summer. [ 2 ] [ 3 ] Habitat and ecology
The 2–6 leaves on the flowering stems are similar in shape to the basal leaves and grow as opposite pairs. They tend to be shorter (25–65 mm long and 3–21 mm wide) and clasp the flowering stem instead of growing on short leaf stems, especially on the upper leaves of the flowering stem. [ 4 ]
It grows in the wild in great numbers in moist meadows. They are perennial plants with basal linear leaves measuring 20 to 80 centimetres (8 to 32 in) in length, which emerge early in the spring. They grow to a height of 30 to 130 cm (12 to 50 in), with a multi-flowered stem rising above the main plant in summer.