| Family | Myrsinaceae (also placed in Primulaceae) |
| Scientific name | Lysimachia mauritiana Lamarck |
| Synonyms | Lubinia lineariloba (Hooker & Arnott) Pax; Lubinia lubinioides (Siebold & Zuccarini) Pax; Lysimachia lineariloba Hooker & Arnott; Lysimachia lubinioides Siebold & Zuccarini; Lysimachia lubinioides Siebold & Zuccarini var. typica Regel; Lysimachia mauritiana Lamarck var. taiwaniana S. S. Ying; Lysimachia nebeliana Gilg |
| Common name | (Japanese common name) hama-bossu (ハマボッス, 浜払子 [coastal hossu (hossu = a Buddhist altar fitting which is used by Buddhist priest)]) |
| (English common name) oosestrife. yellow loosestrife | |
| Distribution | (Japan) Hokkaido, Honshu, Shikoku, Kyushu, Okinawa |
| (Other nations) Korea, China, Taiwan, Philippines, Pacific Islands, India, Indian Ocean Islands (Mauritius, Reunion) | |
| Habitat | Seashore rocks, beach |
| Chromosomal number | 2n=20 |
| Description | Plants 10-40cm tall. Leaves 2-5cm long, 1-2.5cm wide. Flowers white corollas 1-1.2cm across, flowering in May to July. Winter annual plants. |
| Reference | Lysimachia mauritiana Lamarck |
| Lysimachia mauritiana Lam. |
| May 2007 at Tsukuba Botanical Garden |
May 2007 at Tsukuba Botanical Garden |
May 2007 at Tsukuba Botanical Garden |