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| August 2008 at Nikko Botanical Garden |
August 2008 at Nikko Botanical Garden |
| Family | Brassicaceae |
| Scientific name | Rorippa nikkoensis H. Hara |
| Synonyms | Rorippa islandica (Oeder) Borbán var. nikkoensis (H. Hara) Kitamura; Rorippa palustris (Leysser) Besser var. nikkoenesis (H. Hara) Kitamura |
| Common name | (Japanese common name) migiwa-garasi (ミギワガラシ, 水際芥子 [meaning: swamp karashi-na (karashi-na = Brassica juncea)]) |
| (English common name) none | |
| Distribution | (Japan) Honshu (Nikko) |
| (Other nations) none | |
| Habitat | Swamp |
| Chromosomal number | unknown |
| Description | Plants 20-50cm tall. Leaves 3-15cm long, 1-5cm wide. Flowers yellow petals 1.5-2mm long, flowering in July to September. Fruits 2.5-4.5mm long, 2-3mm wide. Annual, winter annual or perennial plants. |
| Note | Endemic to Japan. Rare species. |
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| August 2008 at Nikko Botanical Garden |
August 2008 at Nikko Botanical Garden |
