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| Photo by Mr. Ponpoko | Photo by Mr. Ponpoko | Photo by Mr. Ponpoko |
| September 2008 at swamp |
September 2008 at swamp |
September 2008 at swamp |
| Family | Rubiaceae |
| Scientific name | Diodia virginiana L. |
| Synonyms | Diodia harperi Small; Diodia hirsuta Pursh; Diodia oblonga Rafinesue; Diodia tetragona Walter; Diodia virginiana L. forma hirsuta (Pursh) Fernald; Diodia virginiana L. var. attenuata Fernald; Diodia virginiana L. var. hirsuta (Pursh) Torrey & A. Gray; Diodia virginiana L. var. latifolia Torrey & A. Gray; Diodia virginiana L. var. linnaei Torrey & A. Gray |
| Common name | (Japanese common name) meriken mugura (メリケンムグラ, メリケン葎 [meaning: American vine weed]) |
| (English common name) Virginia buttonweed | |
| Distribution | (Japan) Honshu (west of Kanagawa Prefecture), Shikoku, Kyushu |
| (Other nations) [native] USA | |
| Habitat | Rice paddy, swamp, riverside |
| Chromosomal number | n=14, 2n=28 |
| Description | Plants 10-80cm long. Leaves 3-6cm long, 0.5-1.5cm wide, petioles 1-2mm long, hairy. Flowers 2 calyx lobes 4-6mm long, white corolla tubes 8-11mm long, 9-11mm across, flowering in July to September. Fruits 6-8mm long. Annual plants. |
| Reference | Diodia virginiana L. |
| Diodia virginiana L. | |
| Diodia virginiana L. | |
| Diodia virginiana L. | |
| Safer control of broadleaf weeds in turf with granular formulations of ALS inhibiting herbicides (WIPO Patent WO/2006/086662) | |
| Penoxsulam as a turfgrass, vineyard and orchard floor herbicide (WIPO Patent WO/2006/086640) | |
| Note | Naturalized plants. |
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| Photo by Mr. Ponpoko | Photo by Mr. Ponpoko | Photo by Mr. Ponpoko |
| September 2008 at swamp |
September 2008 at swamp |
September 2008 at swamp |
