(First upload on May 31 2018. Last on November 30 2018) [ 日本語 | English ]

Mirabilis jalapa L.

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

⇒ Engler's syllabus (エングラー体系)

Nyctaginaceae Juss. (オシロイバナ, four o'clock) in Japan

290 species in around 33 genera
Distribution: mainly in tropical and subtropical regions
Fruit: anthocarp
Pollen grain: extremely large (> 100 μm)
Bougainvillea Comm. ex Juss. (イカダカズラ)
Mirabilis L. (オシロイバナ)
Pisonia L. (ウドノキ)

Mirabilis L. (オシロイバナ, four-o'clocks) in Japan

About 60 species in the world
M. jalapa L. (オシロイバナ)
M. longifolia L. (ナガバナオシロイバナ)
M. nyctaginea (Michx.) MacMill. (イヌオシロイバナ)

Mirabilis jalapa in Japan

Oshiroibana (オシロイバナ, 白粉花/白粧花), marvel of Peru or four o'clock flower
Lifeform: annual or perennial forb
Distribution: tropical South America

naturalized throughout tropical and warm-temperate regions
introduced to Japan in early Edo Era

Habitat: under full sun
Sepal: red, yellow, white, etc. (no petals)
Use: ornamental, medicine
f. dichlamydomorpha (Makino) Hiyama (フタエオシロイバナ)

[1] in Oi Pier Seaside Park, Tokyo, on December 26 2015. [2/3] in the hometown forest of Haramachida, Tokyo, on December 10 2017. [4/5] on a bank along Sophia Street, Chiyoda Ward, Tokyo, on October 19 2018.