Tilia japonica

Tilia japonica, the Japanese lime or Japanese linden, is a species of Tilia native to eastern China and Japan, preferring to grow in mountains up to 2000 m. It superficially resembles the better-known Tilia cordata, the small-leaved lime, and was originally described as Tilia cordata var. japonica. It differs from T. cordata in having 164 chromosomes instead of 82, and by some subtle differences in leaf and flower morphology. T. japonica inflorescences consistently have 5 staminodes, which is a reliable trait distinguishing it from T. cordata and T. amurensis. Recent studies indicate T.japonica to play an important role in maintaining the ectomycorrhizal networks in local forests it grows in Japan....read more on Wikipedia.