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| September 2006 at open field |
September 2006 at open field |
September 2007 at Tsukuba Botanical Garden |
| Family | Rubiaceae |
| Scientific name | Diodia teres Walter |
| Synonyms | Diodella teres (Walter) Small; Diodia prostrata Swartz; Diodia prostrata Swartz var. longiseta de Candolle; Diodia teres Walter forma latifolia Steyermark; Diodia teres Walter forma latior Steyermark; Diodia teres Walter forma leiocarpa Steyermark; Diodia teres Walter subsp. angustata (A. Gray) Steyermark; Diodia teres Walter subsp. prostrata (Swartz) Steyermark; Diodia teres Walter var. angustata A. Gray; Diodia teres Walter var. hirsutior Fernald & Griscom; Diodia teres Walter var. hystricina Fernald & Griscom; Diodia teres Walter var. oblongifolia Fernald; Diodia teres Walter var. setifera Fernald & Griscom; Diodia teres Walter var. typica Fernald & Griscom |
| Common name | (Japanese common name) oh futa-ba mugura (オオフタバムグラ, 大双葉葎 [meaning: large twin leaved vine weed]), tachi futa-ba mugura (タチフタバムグラ, 立双葉葎 [meaning: standing twin leaved vine weed]) |
| (English common name) poorjoe, rough buttonweed | |
| Distribution | (Japan) Honshu (south of Miyagi prefecture), Shikoku, Kyushu |
| (Other nations) [native] USA, Mexico | |
| Habitat | Roadside, field |
| Chromosomal number | 2n=28 |
| Description | Plants 10-50cm tall. Leaves 1-4cm long, 2-4mm wide. Flowers pink or white corollas 4mm across, flowering in July to September. Annual plants. |
| Reference | Diodia teres Walter |
| Diodia teres Walt. | |
| Diodia teres Walter | |
| Note | Naturalized plants (first discovered at Tokyo in 1927) |
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| September 2006 at open field |
September 2006 at open field |
September 2007 at Tsukuba Botanical Garden |
