Alnus sieboldiana (ãªãªãÂÂã¤ã·ã£ãÂÂã· in Japanese) is an alder species found on the islands of Honshu, Shikoku, and Suwanosejima in Japan.
A. sieboldiana contains ellagitannins including alnusiin, tellimagrandin I, pedunculagin, casuarinin, casuariin and 2,3-O-(S)-hexahydroxydiphenoyl-D-glucose.
The Latin specific epithet sieboldiana refers to German physician and botanist Philipp Franz von Siebold (1796âÂÂ1866).