| Family | Myrsinaceae (also placed in Primulaceae) |
| Scientific name | Lysimachia fortunei Maximowicz |
| Synonyms | Lysimachia fortunei Maximowicz forma suboppositifolia Honda; Lysimachia fortunei Maximowicz var. pubescens Pampanini |
| Common name | (Japanese common name) numa-tora-no-o (ヌマトラノオ, 沼虎尾 [swamp tiger tail]) |
| (English common name) none | |
| Distribution | (Japan) Honshu, Shikoku, Kyushu |
| (Other nations) Korea, China, Taiwan, Vietnam | |
| Habitat | Swamp, wet field |
| Chromosomal number | 2n=24 |
| Description | Plants 40-70cm tall. Leaves 4-7cm long, 1-1.5cm wide. Flowers inflorescences 10-20cm long, white corollas 5-6mm across, flowering in July to August. Perennial plants. |
| Reference | Lysimachia fortunei Maximowicz |
| July 2007 at lowland swamp | July 2007 at lowland swamp | July 2007 at lowland swamp |
| July 2007 at lowland swamp |
| July 2007 at mountane field |
July 2007 at mountane field |
July 2007 at mountane field |