Citrus hindsii
This specific name is first published in World Checklist of Seed Plants 3(1): 15 (1999).[5][6] Recent phylogenetic analysis suggested that C. hindsii is a single 'true' species.[7][8] Citrus hindsii produces small, round, pea-sized, bitter and acidic fruit with very little pulp and large seeds.In warmer regions, it is primarily grown as an ornamental plant as well as houseplant and bonsai.[8] While the wild Hong Kong kumquat is tetraploid, there is a commercial diploid variety, the Golden Bean kumquat, with slightly larger fruit.