Which has fewer species, Rossioglossum or Bruckenthalia?
Rossioglossum: Rossioglossum is a genus of flowering plants from the orchid family, Orchidaceae. Bruckenthalia: Bruckenthalia is a genus of plants consisting of only one species, Bruckenthalia spiculifolia (spike heath) an evergreen shrub native to southeastern Europe and Asia Minor.
i don't know