Aristolochia
onoei Franch. & Sav.
Distribution : Japan
Picture 3 in Japan, Honshu, road to Mt. Rokko, May 2008
(Picture 8 with flowers of Clematis japonica)
(Picture 9 with flowers of Hydrangea hirta)
Description in Acta Phytotax. Geobot. 1939, viii. 50
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