(First upload on October 6 2011. Last on July 22 2023) [ 日本語 | English ]

Metaplexis japonica (Thunb.) Makino

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

Metaplexis R. Br. (ガガイモ) in Japan
One species, Metaplexis japonica, is distributed in Japan
Gagaimo (ガガイモ, 蘿芋), rough potato
Lifeform: deciduous, perennial climber
Distribution: east Asia, including Japan
Habitat: sunny sites, such as grasslands, forest edges, and roadsides

Field training on integrated environmental research (統合環境調査法実習) (fauna and flora 種リスト)

Leaf: opposite phyllotaxis
Fruit: used for medicine (羅摩子)
Chromosome number: 2n = 22 or 24
f. albiflora Honda (シロバナガガイモ)

Welsh SL, Anderson DE. 1962. Metaplexis japonica: an oriental milkweed from an Iowa cornfield. Brittonia 14: 186-188

MetaplexisCynanchum caudatum (イケマ)
Leaf abaxial side = pale green ↔ white-green
Latex = white ↔ less

Metaplexis japonica in Hokkaido

[1-3] climbing up on a fence in N27/W3, North Ward, Sapporo, on August 31 2011. [4] on a hedge in N24/E1, East Ward, Sapporo, on August 28 2019. [5] on a parking lot in the backyard of Tougeshita Head Store of Lucky Pierrot, Nanae Town, southern Hokkaido, on July 11 2023. [6] at a roadside, N23/E1, East Ward, Sapporo, on July 18 2014. Record: in the campus of Northeast Normal University in Changchun, northeastern China, on June 5 2017. Along O-sawa Course in Nopporo Forest Park on July 17 2021.