40. Hellebore
Despite numerous common names that reference roses like Lenten Rose, Winter Rose, and Christmas Rose, the Hellebore is not a rose at all and is, in fact, a member of the Ranunculaceae family which does not include roses. Lenten Roses are a truly stunning flower, with incredibly unusual flower shades that include greens, beiges, browns, and other rare hues.
They bloom early in the spring, and some varieties have evergreen foliage. Northern gardeners will have to shelter these plants to overwinter, as they are only hardy to USDA Zone 5. Toxicity note: all parts of Hellebores are toxic, and some gardeners may experience skin reactions.