-This is a large genus of rock plants requiring a dry position in full sun, and thorough drainage is essentialfor their success. They are propagated by seeds sown in gentle heat in March, or by cuttings in July. We describe the three best species : Onosma albo-roseum.This has hoary, white leaves on sub-shrubby stems. Flowers white, changing to rose, in racemes. Site sunny. Soil gritty loam. Flowering Period, June. Height, 4 ins. 0. Bourgaei.This has hoary leaves in tufts. Flowers white and bell-shaped. Site sunny. Soil gritty and stony. Flowering Period, June. Height, 4 ins. 0. eckioides (Syn. 0. tauricum) (Golden Drop).This has deepgreen foliage, and produces narrow leaves in tufts on sub-shrubby stems. Flowers bright yellow. Site sunny. Soil, deep gritty or rock crevice. Flowering Period, May to July. Height, 9 ins.
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