| Family | Fabaceae (alt. Leguminosae) |
| Scientific name | Vitex rotundifolia L. f. |
| Synonyms | Vitex agnus-castus L. var. ovata (Thunberg) Makino; Vitex ovata Thunberg; Vitex repens Blanco; Vitex trifolia L. subsp. litoralis Steenis; Vitex trifolia L. var. obovata Bentham; Vitex trifolia L. var. ovata (Thunberg) Makino; Vitex trifolia L. var. ovata (Thunberg) Merrill; Vitex trifolia L. var. repens Ridley; Vitex trifolia L. var. simplicifolia Chamisso; Vitex trifolia L. var. unifoliata Schauer |
| Common name | (Japanese common name) hma-go [beach creeping weed] |
| (English common name) round-leaf chastetree, beach vitex | |
| Distribution | (Japan) Hokkaido, Honshu, Shikoku, Kyushu, Okinawa |
| (Other nations) Korea, China, Taiwan, Philippines, Thailand, Malaysia, Indonesia, Papua New Guinea, Australia, Fiji, New Caledonia, Pacific Islands | |
| Chromosomal number | 2n=32 |
| Description | Plants creeping on sand, branchs electing 30-60cm length. Leaves 2-5cm. Flowers purple corollas 1.5cm, flowering in July to September. Deciduous. Shrub. |
| Reference | Vitex rotundifolia L. f. |
| Vitex rotundifolia Linnaeus f. | |
| Vitex rotundifolia |
| July 2007 at Tsukuba Botanical Garden |
July 2007 at Tsukuba Botanical Garden |
July 2007 at Tsukuba Botanical Garden |