Pre‐pollination barriers between two sympatric Arisaema species in northern Shikoku Island, Japan

Premise The genus Arisaema (Araceae) has rapidly diversified in Japan, and multiple species often coexist in the field. Although Japanese Arisaema species hybridize from artificial crossing, hybrid individuals are rare in mixed populations; suggesting the presence of effective pre‐pollination barriers. We examined the following reproductive barriers between A. sikokianum and A. tosaense : habitat, phenology, and pollinator isolations. Methods...