Diodia teres




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)



September 2006
at open field
September 2006
at open field
September 2007
at Tsukuba Botanical Garden