| Family | Asteraceae (alt. Compositae) |
| Scientific name | Ixeris repens (L.) A. Gray |
| Synonyms | Chorisis repens (L.) de Candolle; Chorisma repens (L.) D. Don; Lactuca brachyrhyncha Hayata; Lactuca repens (L.) Bentham ex Maximovicz; Nabalus repens (L.) Ledebour; Prenanthes repens L. |
| Common name | (Japanese common name) hama-nigana (ハマニガナ, 浜苦菜 [meaning: beach bitter salad weed]) |
| (English common name) none | |
| Distribution | (Japan) Hokkaido (southwest region), Honshu, Shikoku, Kyushu, Okinawa |
| (Other nations) Russia (Far East), Korea, China, Taiwan, Vietnam | |
| Habitat | Sand beach |
| Chromosomal number | n=8, 2n=16 |
| Description | Plants creeping. Leaves 3-5cm. Flowers yellow ca. 3cm, flowering in May to July. Perennial plants. |
| Reference | Ixeris repens (L.) A. Gray |
| A Cytological Study of Ixeris nakazonei (Asteraceae; Lactuceae) in Okinawa Island, the Ryukyus |
| June 2008 at sand beach |
June 2008 at sand beach |
June 2008 at sand beach |
| June 2008 at sand beach |