MULTI-BUY 3 FOR $20 . 1 litre sized pot. Buphthalmum salicifolium is a deciduous perennial with clumped, lance shaped medium green leaves. Bright yellow daisy-like flowers are seen from summer, reaching up to 60cm high on slender, strong stems. Great Performers. Likes a sunny position and copes with poor soils once established. Also known as Yellow ox-eye, it is native to Europe. Selecting this option gives you 3 x 1 litre Buphthalmum salicifolium plants for $20.