| Family | Araceae |
| Subfamily | Aroideae |
| Tribe | Arisaemateae |
| Scientific name | Arisaema monophyllum Nakai |
| Synonyms | none |
| Common name | (Japanese common name) hitotsu-ba ten-nan-shou (ヒトツバテンナンショウ, 一葉天南星 [meaning: single leaf ten-nan-shou (ten-nan-shou = a kind of traditional Chinese medicine)]) |
| (English common name) none | |
| Distribution | (Japan) Honshu (north of Central Region) |
| (Other nations) none | |
| Habitat | Mountane forest |
| Chromosomal number | unknown |
| Description | Plants ca. 30-60cm tall. Leaves single (merely 2), 7-9 leaflets. Flowers green (with single dark brown stripe) spathes ca. 8-15cm long, flowering in April to June. Perennial plants. |
| Reference | Arisaema monophyllum Nakai |
| April 2009 at mountane forest |
April 2009 at mountane forest |
April 2009 at mountane forest |
| April 2009 at mountane forest |
April 2009 at mountane forest |
April 2009 at mountane forest |