Symplocarpus koreanus (Araceae; Orontioideae), a new species based on morphological and molecular data

Symplocarpus koreanus (Araceae; Orontioideae) from Korea is described as new. has long been considered to be conspecific with S. renifolius in Japan, but phylogenetic, morphological, and cytological data indicate its taxonomic distinction. Compared renifolius, a much smaller spathe more spherical spadix fewer, flowers. Previous phylogenetic studies also suggested that closely related nonthermogenic nipponicus than Japan. Like sister species, nipponicus, diploid (2n = 2x 30), while Japan tetraploid 4x 60). A detailed species description, geographical distribution, major morphological differences between the dichotomous key eastern Asia are provided. Keywords: Araceae, Orontioideae, koreanus, Korean endemic, skunk cabbage