| Family | Myrsinaceae (also placed in Primulaceae) |
| Scientific name | Lysimachia davurica Ledebour |
| Synonyms | Lysimachia dauriensis Baudo; Lysimachia vulgaris L. subsp. davurica (Ledebour) Tatewaki; Lysimachia vulgaris L. var. davurica (Ledebour) R. Kunth |
| Common name | (Japanese common name) kusa-redama (クサレダマ, 草連玉 [meaning: herbal redama (redama = Spartium junceum L.)]) |
| (English common name) none | |
| Distribution | (Japan) Hokkaido, Honshu, Kyushu |
| (Other nations) Russia, Korea, China, Mongolia | |
| Habitat | Swamp) |
| Chromosomal number | 2n=24, 42 |
| Description | Plants 40-100cm tall. Leaves 4-12cm long, 1-3cm wide. Flowers yellow corollas 12-15mm across, flowering in July to August. Fruits ca. 4mm across. Perennial plants. |
| Reference | Lysimachia davurica Ledeb. |
| Lysimachia davurica Ledebour | |
| Lysimachia L. |
| June 2007 at Tsukuba Botanical Garden |
June 2007 at Tsukuba Botanical Garden |
June 2007 at Tsukuba Botanical Garden |