Euphorbia amygdaloides var. robbiae ‘Pom Pom’

A charming dwarf form of this incredibly tough species: I've grown it in dry shade at the edge of the car-park here for about 20 years. The non-flowering shoots bear little evergreen rosettes of foliage on stalks, elongating to flower in their 2nd year with classic, but smaller, yellow-green flowers in April. 50cm. Sun or part-shade. Seems less vigorous than the standard type as mine has only formed a smallish patch over all these years.