抄録
A molecular phylogenetic analysis of Aristolochia subgenera Siphisia and Aristolochia (Aristolochiaceae) was conducted based on the nucleotide sequence variation in the matK gene. Sixty seven samples covering much of the taxonomic/morphological diversity within the two subgenera, excepting subseries Anthocaulicae, were analyzed using Saruma henryi, Asarum yakusimense and Thottea tomentosa as outgroups. The phylogenetic tree obtained was generally consistent with the current classification system and discrepancies were found only in a small portion concerning subsect. Pentandrae and its allies. The species of subgenus Siphisia from Japan and Taiwan and A. mollissima from southern China form a terminal monophyletic clade with few site changes found among them.
