Anemone nemorosa ‘Virescens’ – An RHS Award of Garden Merit winner with mop-headed flowers made entirely of green leafy bracts, with occasional white highlights and purple tinting. These appear from April to May over green foliage and it makes a good shade groundcover. Usually goes summer dormant with the onset of drier weather. Grows 5-6″ high with a 12″+ spread. Z4.
Anemone coronaria ‘Harmony Blue’ – A tuberous perennial and compact form of Poppy Anemone with 2″ wide periwinkle-blue blooms (with a darker eye) from late spring to midsummer. These are semi-double to double in form and held on strong stems over bright green, finely cut foliage that is very fern-like. Grows 8 to 12″ high by 8″ wide. Hardy to zone 6.
Anemone x lipsiensis ‘Vindobonensis’ (syn. Anemone nemorosa ‘Vindobonensis’, Anemone x vindobonensis) – An older cultivar of Anemone x lipsiensis (a cross of A. nemorosa and A. ranunculoides) with larger creamy-yellow single daisy blooms from April to June. The new foliage is often red tinted and it blooms earlier than A. x lipsiensis. Grows 8″ high. Zone 5.
Anemone pavonina – This Mediterranaean native is a tuberous perennial that is somewhat similar to Anemone coronaria with variable blooms of red, pink, salmon and purple – all with a darker eye highlighted by a white ring. It requires well-drained soil with a full sun exposure and produces green basal foliage. Self-seeds where happy. Grows 10-12″ high by 6-10″ wide. Zone 7-8.
Anemone sylvestris – The Snowdrop Anemone is an herbaceous perennial native to north and central Europe. It bears pure white cup-shaped blooms (1.5-2″ wide) in late spring on slightly arching upright stems – these are followed by fluffy seedheads. Best grown in part to full sun exposures. Consider this species a vigorous spreader. Grows 12-18″ high by 12″ wide. Hardy to zone 4.