"black floral" are more deeep purple flowers for that blackberry accent
Trifolium 'Dark Dancer' color is somewhere between chocolate and dark purple. A good edging plant or ground cover, looks fantastic against light green plants. under tall, sun to partial shade, average water needs.
Black Lace- Elderberry- Sambucus Nigra :The flowers, foliage, and fruit of Black Lace™ elderberry bring drama to the garden all season long.
A stunning black plant for your perennial garden! Primo Black Pearl heuchera is hardy to zone 4 and will grow in sun or shade! - New Gardening Ideas