Alyssum spruneri (syn. Alyssum stribrnyi)

A serious bit of yellow on this rock garden gem. The dome of small silver leaves is completely obscured by the mass of yellow flowers in May and June here. We let ours go to seed so we can enjoy more seedlings. This is visually nearly identical to three other distantly related species in the Mediterranean and may reflect parallel evolution from similar habitats. Very good drainage. low organic matter component and dry conditions.