Heliopsis helianthoides is a perennial in the Asteraceae that produces sunflower-like heads and reaches about 1.5 m. It flowers from July to September, providing a sustained late-summer display. Plants prefer full sun and do best in soils that are moist but well-drained, including sandy, loamy or clay types. In the UK it is fully hardy (H7).

Smooth ox-eye (Heliopsis helianthoides) is a 1.5 m perennial that flowers July to September and prefers full sun in moist, well-drained soils.

https://en.wikipedia.org/wiki/Heliopsis_helianthoides

Heliopsis is a genus of herbaceous flowering plants in the family Asteraceae, native to dry prairies in North and South America. The sunflower-like composite flowerheads are usually yellow, up to 8 cm (3 in) in diameter, and are borne in summer.

Heliopsis helianthoides

Smooth ox-eye | Heliopsis helianthoides

Heliopsis scabra is a flowering plant in the family Asteraceae and a member of the genus Heliopsis. It flowers from July to September, providing sustained summer-to-early-autumn colour. As an Asteraceae it bears composite flowerheads with ray florets surrounding a central disc. Compare care and selection with other Heliopsis when choosing plants for extended summer display.

Heliopsis scabra flowers from July to September and belongs to the Asteraceae genus Heliopsis.

Heliopsis scabra

Heliopsis scabra 'Golden Plume' is a named cultivar in the genus Heliopsis and the family Asteraceae, offered for its summer flowering display. It reliably flowers from July to September. Check the supplier label for specific size and siting information for this selection.

Heliopsis scabra 'Golden Plume' flowers from July to September and sits in the Asteraceae family.

Heliopsis scabra 'Golden Plume'

Heliopsis scabra 'Incomparabilis' is a rhizomatous herbaceous perennial in the sunflower family that produces daisy-like yellow flowerheads from July to September. Stems are typically upright and can reach roughly 0.4–1.5 m, often stiff enough to need staking. Leaves are toothed and may be smooth, rough or hairy in texture. The cultivar flowers in midsummer and into early autumn.

Heliopsis scabra 'Incomparabilis' bears yellow, daisy-like flowerheads from July to September and prefers moist, sunny positions.

Heliopsis scabra 'Incomparabilis'

False Sunflower | Heliopsis scabra 'Incomparabilis'

Heliopsis scabra 'Light of Loddon' is a herbaceous perennial in the Asteraceae, prized for a long display of yellow composite flowers. It flowers reliably from July to September. Plants produce upright stems that bear clear, daisy-like heads. Allow room for stems and provide support if needed when blooms are heavy.

Heliopsis scabra 'Light of Loddon' produces yellow summer blooms from July to September and favours full sun and moist, fertile soil.

Heliopsis scabra 'Light of Loddon'

Heliopsis scabra 'Patula' is an herbaceous perennial in the genus Heliopsis (Asteraceae) that flowers from July to September with composite yellow heads. It grows from short rhizomes and has toothed leaves with a rougher texture. Plants form clumps that may need some staking when the blooms are heavy. The fertile rays and central disc florets give a long summer display.

Heliopsis scabra 'Patula' flowers from July to September with yellow composite heads in sunny, moist garden spots.