One genus
    ~10-50 species


"Canna, the solitary genus in the family, is primarily found in the New World tropics and subtropics. Estimates on the number of species in Canna range from ten (to 50). The presence of mucilage cells and a petal-like style fused to the single fertile stamen are distinctive features of the family. Many hybrid cannas, for example C. x generalis, C. x orchioides, and C. x ehemanii, are grown as landscape ornamentals. The name Canna, from the Greek 'kanna' meaning a reed, most likely refers to the reed-like appearance of the stems."  - description via Smithsonian NMNH