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| April 2007 at Akagi Nature Park |
April 2007 at Nikko Botanical Garden |
April 2007 at Akagi Nature Park |
| Family | Aristolochiaceae |
| Scientific name | Asarum caulescens Maximovicz |
| Synonyms | Asarum brevistylum Franchet; Asarum caulescens Maximowicz forma geroense J. Ohara; Asarum franchetianum Diels; Japonasarum caulescens (Maximowicz) Nakai |
| Common name | (Japanese common name) futaba-aoi (フタバアオイ, 双葵 or 二葉葵 [meaning: two leaves winter hollyhock]) |
| (English common name) none | |
| Distribution | (Japan) Honshu (west of Fukushima prefecture), Shikoku, Kyushu |
| (Other nations) China | |
| Habitat | Mountane forest |
| Chromosomal number | n=13, 2n=26 |
| Description | Plants creeping. Leaves 4-8cm wide. Flowers 12-14mm across, flowering in April to May. Perennial plants. |
| Reference | Asarum caulescens Maximowicz |
| Self-pollination of Asarum caulescens Maxim. (Aristolochiaceae) in Japan | |
| Agent for hair growth (European Patent EP1915997/2008) |
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| April 2007 at Akagi Nature Park |
April 2007 at Nikko Botanical Garden |
April 2007 at Akagi Nature Park |
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| May 2007 at Mt. Tsukuba |
May 2007 at Mt. Tsukuba |
