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(First upload on September 5 2017. Last on October 20 2020) [ 日本語 | English ]

Tagetes L. (コウオウソウ) Kouousou (コウオウソウ, 紅黄草), French marigold Life form: annual forb Distribution: native to Mexico and Guatemala Habitat: escaped (in the case of Japan) Use: gardening, as a companion planting for vegetable crops (see facilitation) because the roots kill nematodes in the soil and repel harmful insects, such as white flies on tomatoes

Synonyms: Tagetes corymbosa Sweet Tagetes lunulata Ortega Tagetes remotiflora Kunze Tagetes signata Bartling Tagetes tenuifolia Millsp. Cultivars: two types French typed: 15-40 cm in height African typed: 50-200 cm in height Afro-French typed = French × African

Tagetes patula L. in Hokkaido

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[1] under a street tree in N15/W3, North Ward, Sapporo, on September 2 2019. [2/3] in front of JR Toya Station, southwestern Hokkaido, on July 25 2017. [1] cv. Duran gold and cv. Safari yellow (mixture). [3] cv. Duran gold. [4] cv. Safari yellow. [5/6] cv. Disco marietta within a small flower garden under a tree in front of the Catholic Church, N26/E1, East Ward, Sapporo City. on October 5 2018. [7/8] elongated shoots at the backyard of NiPR (National Institute of Polar Research), Tokyo, on November 17 2018. Records: many other box gardens under street trees.

Tagetes erecta L. in Hokkaido

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Senjugiku (センジュギク, 千寿菊), Mexican marigold or Aztec marigold, formerly African marigold Lifeform: annual forb

Distribution: Mexico (not Africa) Chromosome number: 2n = 48 (and others)

Use: gardening

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[1] cv. Perfection yellow under a street tree in N13/W4, North Ward, Sapporo, on July 20 2019. [2/3] in front of Keio Plasa Sapporo Hotel near JR Sapporo Station on September 30 2020.

Tagetes tenuifolia Cav. in Hokkaido

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Hosobakouousou (ホソバコウオウソウ, 細葉紅黄草), Mexican marigold

Hosobakujakusou (ホソバクジャクソウ, 細葉孔雀草)

Use: gardening

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[1-3] in front of a pharmacy in N15/W4, North Ward, Sapporo, on October 26 2019.