The World Flora Online

Stems erect from short caudex or rhizome, never rooting nodally, hispid, strigose, or glabrous, base not bulbous. Roots never tuberous. Basal leaf blades pentagonal in outline, deeply 3-5-parted, 1.8-5.2 × 2.7-9.8 cm, segments 1-2×-lobed or -parted, ultimate segments narrowly elliptic or oblong to lanceolate, margins toothed or lobulate, apex acute to rounded. Flowers: receptacle glabrous; sepals spreading, 4-6(-9) × 2-5 mm, hispid; petals 5, yellow, 8-11(-17) × 7-13 mm. Heads of achenes globose, 5-7(-10) mm wide; achenes 2-3 × 1.8-2.4 mm, glabrous, margin forming narrow rib 0.1-0.2 mm wide; beak persistent, deltate, usually with tip short or long, straight or curved, subulate, 0.2-1 mm. 2 n = 14.

Source: [
• 1
]. 

Spreading-hairy perennial, slender, eventually to 1 m, leafy mostly below the middle, the long branches with few, widely separated, much reduced lvs; lvs reniform, deeply 3-cleft, the broadly cuneate-obovate segments incised or cleft into oblong or linear lobes; pet broadly obovate, often retuse, 8–16 mm, twice as long as the sep; achenes in a subglobose head, flat, margined, broadly and obliquely obovate, 2–3 mm, the beak 0.4–1 mm; 2n=14, 28, 29, 32. Native of Europe, widely introduced in N. Amer. as a weed in fields and meadows and along roadsides. May–Sept. Double-flowered forms occur.

Source: [
• 3
]. 

30–100 cm hoch, reich verzweigt, anliegend behaart bis kahl. Blütenstiele rund. Kelchblätter den Kronblättern anliegend. Blüten gelb, Durchmesser 2–3 cm. Blütenboden kahl.

Source: [
• 2
].