Stunningly beautiful flowers - large, pale lemon-yellow with dozens of long stamens on fine stalks that stand out from the petals. They remind me of those optical fibre lamps we used to see.
'Citrinum' produces all these flowers over several weeks in summer on neat little bushes with tiny leaves. It likes sunshine and a well-drained soil but it's an adaptable plant. The only maintenance it might need is a quick trim after flowering - just to keep it tidy or keep its shape. About 15 - 20cm (6" to 8") high.
I really like this plant. And it holds an AGM.
It's full name is - Hypericum olympicum f. minus 'Citrinum'