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

Tagetes patula L.






Mount Usu / Sarobetsu post-mined peatland
From left: Crater basin in 1986 and 2006. Cottongrass / Daylily

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

索引

Tagetes patula L. in Hokkaido


ST1 ST2 ST3
ST4 ST5 ST6
ST7 ST8
[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 flower bed 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


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

ST1 ST2 ST3
[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


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

ST1 ST2 ST3
[1-3] in front of a pharmacy in N15/W4, North Ward, Sapporo, on October 26 2019.

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