what does Helleborus niger mean?

HELLEBORUS NIGER as NOUN

Meaning
- European evergreen plant with white or purplish roselike winter-blooming flowers
Synonym(s)
- black hellebore (what does black hellebore mean?)
- Christmas rose (what does Christmas rose mean?)
- winter rose (what does winter rose mean?)
Hypernyms(s) Helleborus niger is a kind of… Example: animal is a hypernym of mammal, plant is a hypernym of flower
- hellebore (what does hellebore mean?)