Leucanthemum ×superbum

Erect, c. glabrous perennial 50–100 cm high, usually unbranched above rhizome. Leaves sessile, lanceolate to elliptic, 3–12 cm long, 5–25 mm wide, acute, base subamplexicaul, margins regularly serrate or serrulate to almost entire on upper leaves. Capitula usually solitary, 5–8 cm diam.; peduncles 5–15 cm long. Ray florets 20–40, white; disc florets numerous, bright yellow. Cypselas slightly dimorphic, 3–4 mm long; ray cypselas c. 10-ribbed with thickened lateral ribs; pappus an irregular corona; disc cypselas regularly 10-ribbed, lacking a pappus. Flowers mostly Dec.–Mar.