Arisaema thunbergii subsp. urashima
 Arisaema thunbergii subsp. urashima is a herbaceous perennial plant. It is widespread through the woodlands of Japan especially near the coast. The plant has a very curious inflorescence and is popular in horticulture. As with all arisaemas the inflorescence consists of a spathe tube enclosing a spadix appendix. In the case of A. thunbergi subsp. urashima the spadix appendix is elongated into a free hanging thread of 45 to 60 cm.