Buphthalmum salicifolium is a perennial herb in the Asteraceae valued for its yellow flower heads. Native to central Europe, it flowers in the UK from June to August. It prefers full sun and well-drained sandy or loamy soil with a neutral to alkaline pH and moderate moisture, and is rated H5 (hardy) for UK gardens.

Yellow Ox Eye (Buphthalmum salicifolium) is a perennial with yellow summer flowers from June to August, suited to full sun and well-drained neutral to.

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

Buphthalmum is a genus of flowering plants in the aster family, Asteraceae. They are native to Europe, and B.

Buphthalmum salicifolium

Yellow ox eye | Buphthalmum salicifolium

Buphthalmum speciosum is a perennial herb in the aster family that bears solitary yellow flower heads on the stem. Leaves are arranged alternately and the heads are subtended by very narrow phyllaries. Flowerheads contain yellow ray and disc florets and produce cypsela fruits, often tipped with a scaly pappus. In the UK it flowers from June to August.

Buphthalmum speciosum produces solitary yellow flower heads from June to August and sets cypsela fruits often tipped with a scaly pappus.