| Family | Araceae |
| Subfamily | Aroideae |
| Tribe | Arisaemateae |
| Scientific name | Arisaema iyoanum Makino subsp. nakaianum (Kitagawa & Ohba) H. Ohashi & J. Murata |
| Synonyms | Arisaema akiense Nakai var. nakaianum Kitagawa & Ohba; Arisaema iyoanum Makino var. nakaianum (Kitagawa & Ohba) Kitagawa & Ohba; Arisaema nakaianum (Kitagawa & Ohba) M. Hotta |
| Common name | (Japanese common name) shikoku ten-nanshou (シコクテンナンショウ, 四国天南星 [meaning: Shikoku Arisaema]) |
| (English common name) none | |
| Distribution | (Japan) Shikoku (Pacific Ocean side) |
| (Other nations) none | |
| Habitat | Mountane forest |
| Chromosomal number | unknown |
| Description | Plants electing 100-120cm tall. Leaves sigle, 9-15 leaflets each 10-24cm long. Flowers corn cup dark brown 13-23cm, flowering in May. Perennial plants. |
| Reference | Cytology and systematics in JapaneseArisaema (Araceae) |
| Note | Rare species. Endemic to Japan. |
| April 2008 at Kochi Prefecture Makino Botanical Garden |
April 2008 at Kochi Prefecture Makino Botanical Garden |
| April 2008 at Kochi Prefecture Makino Botanical Garden |