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| August 2006 at high marsh |
August 2005 at high mountain |
| Family | Plantaginaceae (also placed in Scrophulariaceae) |
| Tribe | Veroniceae |
| Scientific name | Veronicastrum japonicum (Nakai) T. Yamazaki |
| Synonyms | Eustachya japonica Rafinesque; Leptandra japonica Rafinesque; Veronica japonica (Rafinesque) Steudel; Veronica sibirica auct., non L.; Veronica virginica L. var. japonica Nakai; Veronicastrum japonicum (Nakai) T. Yamazaki forma album T. Yamazaki; Veronicastrum sibiricum auct., non (L.) Pennell; Veronicastrum sibiricum (L.) Pennell subsp. japonicum (Nakai) T. Yamazaki; Veronicastrum sibiricum (L.) Pennell var. japonicum (Nakai) H. Hara; Veronicastrum sibiricum (L.) Pennell var. japonicum (Nakai) H. Hara forma album Sugimoto ex T. Shimizu |
| Common name | (Japanese common name) kugai-sou (クガイソウ, 九蓋草 or 九階草 [meaning: 9 roofs weed]) |
| (English common name) none | |
| Distribution | (Japan) Honshu (Central region) |
| (Other nations) none | |
| Habitat | Fields |
| Chromosomal number | 2n=34, 68 |
| Description | Plants electing 80-130cm tall. Leaves 4-6 verticillate, each 5-18cm long, 2-4cm wide. Flowers purple or white (forma album) corollas ca. 7-8mm long, flowering in July to August. Perennial plants. |
| Reference | Veronicastrum sibiricum (Linnaeus) Pennell |
| Note | Native to Japan |
| Veronicastrum sibiricum (L.) Pennell subsp. yezoense (H. Hara) T. Yamazaki is not a synonym of Veronicastrum japonicum (Nakai) T. Yamazaki. |
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| August 2006 at high marsh |
August 2005 at high mountain |
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| August 2006 at high marsh |
August 2006 at high marsh |
August 2006 at high marsh |
