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| February 2007 at Tsukuba Botanical Garden |
February 2007 at Tsukuba Botanical Garden |
| Family | Araceae |
| Subfamily | Aroideae |
| Tribe | Arisaemateae |
| Scientific name | Arisaema ringens (Thunberg) Schott |
| Synonyms | Arum ringens Thunberg; Arisaema arisanense Hayata; Arisaema glaucescens (Nakai) Nakai; Arisaema ringens (Thunberg) Schott var. glaucescens Nakai; Arisaema ringens (Thunberg) Schott var. praecox (C. Koch) Engler; Arisaema ringens (Thunberg) Schott var. sieboldii (de Vriese) Engler ex C.Koch; Arisaema praecox de Vriese ex C. Koch; Arisaema sieboldii de Vriese ex C. Koch; Arisaema taihokense Hosokawa; Ringentiarum glaucescens Nakai; Ringentiarum ringens (Schott) Nakai; Ringentiarum ringens (Schott) Nakai var. sieboldii (de Vriese & C. Koch) Nakai |
| Common name | (Japanese common name) musashi abumi (ムサシアブミ, 武蔵鐙 [meaning: musashi stirrup (musashi = an old name of Kanto region)]) |
| (English common name) Jack in the pulpit | |
| Distribution | (Japan) Honshu (west of Kanto region), Shikoku, kyushu, Okinawa |
| (Other nations) Korea, China, Taiwan | |
| Habitat | Forest |
| Chromosomal number | 2n=28 |
| Description | Leaves 2, each 3 leiflets, each 12-30cm long, petioles 12-25cm long. Flowers brown or green spathes 7.5-10.5cm long, flowering in March to May. Terrestrial. Fruits 1cm long, 3 seeds 6mm long. Perennial plants. |
| Reference | Arisaema ringens (Thunb.) Schott |
| The Systematic Study of Taiwanese Arisaema (Araceae) | |
| Agent for hair growth (European Patent EP1915997/2008) | |
| Note | Wild plant is relatively rare. |
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| February 2007 at Tsukuba Botanical Garden |
February 2007 at Tsukuba Botanical Garden |
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| April 2007 at Institute for Nature Study |
April 2007 at my home |
