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(Upload on December 31 2025) [ 日本語 | English ]

Ruellia L. (ルイラソウ) Yanagibaruirasou (ヤナギバルイラソウ, 柳葉縷衣羅草), Mexican petunia, Mexican bluebell or Britton wild petunia (ムラサキイセハナビ) Lifeform: evergreen perrenial forb or shrub Distribution: Mexico - Caribbean - South America widespread invasive species Habitat: in a wide range of environments from dry pavement to wetlands — even growing through cracks in concrete

Chromosome number: 2n = 34 (diploid) Use: gardening (houseplant), need to prevent escape Synonyms: Ruellia tweediana Griseb. Ruellia brittoniana Leonard Ruellia angustifolia (Nees) Lindau Cryphiacanthus angustifolius Nees

Ruellia simplex in Japan

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[1-3] in Jindai Botanical Gardens, Chofu, central Japan, on July 30 2025.