Helleborus, which can cause tinnitus, vertigo, stupor, thirst, a feeling of suffocation, swelling of the tongue and throat, emesis (vomiting), and catharsis, bradycardia (slowing of the heart rate), and finally collapse and death from cardiac arrest. Pretty though.
Negrita (One of 25 Best Tulips for Your Garden) Though it's not as darkly colored as its name suggests, the purple color looks great in the garden with almost everything. Name: Tulipa 'Negrita' Bloom Season: Mid spring Growing Conditions: Full sun and well-drained Size: To 16 inches tall Zones: 4-6 This is an especially good cut flower with strong stems. It also forces well.
Tulipa 'Cafe Noir' - Brooding near-black flowers top the stout stems of this single late tulip. Excellent in late spring and early summer bedding schemes, its rich chocolate-red colouring looks great as a contrast to creamy whites and yellows, or toned with soft pinks.