Home
Stems hollow, 2–6 dm, branched above; basal lvs long-petioled, the broadly cordate-rotund blade usually with a deep and narrow sinus; cauline lvs with progressively shorter petiole and wider sinus; fls bright yellow, 1.5–4 cm wide; stamens 50–120; anthers linear-oblong or lance-oblong, 2 mm; follicles 4–15, 10–15 mm; 2n=32. Wet woods and meadows, swamps, bogs, and shallow water; circumboreal, s. to Va., W.Va., Ind., Ill., and Io., and in the mts. to N.C. and Tenn. Apr.–June. Forms with the basal leaves somewhat flabellate, with a relatively broad and open sinus, do not appear to be taxonomically separable. (var. flabellifolia)
Stems leafy, permanently erect, or sprawling with age and producing roots and shoots at nodes. Basal leaves: blade rounded to ovate, reniform, or cordate, largest (0.5-)2-12.5 × (1-)2-19 cm, margins entire or crenate to dentate. Inflorescences 1-7-flowered. Flowers 10-45 mm diam.; sepals yellow or orange, (6-)10-25 mm. Follicles 5-15(-25), spreading, sessile, ellipsoid; bodies 8-15 × 3-4.5 mm; style and stigma straight or curved, 0.5-2 mm. Seeds elliptic, 1.5-2.5 mm. 2n=32, 56, 60.
A perennial plant. It grows 15-38 cm high and 45-60 cm wide. The roots are long and white. The stems are stout and hollow. The leaves are kidney shaped and deep green. They are 5-18 cm wide. The lower leaves have long stalks while higher leaves do not have stalks. The flowers are cup shaped. They are rich yellow. They can occur singly or in clusters.
