(First upload on September 15 2008. Last on March 2 2018) [ 日本語 | English ]

Portulaca oleracea 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)

Portulacaceae L. in Japan

Montia L. (ヌマハコベ)
Japan has two native species in this family.
M. fontana L. (ヌマハコベ)
M. perfoliata (Willd.) Howell (ツキヌキヌマハコベ): exotic
Portulaca L. (スベリヒユ)
P. grandiflora Hook. (マツバボタン)
P. okinawensis Walker et Tawada (オキナワマツバボタン)
P. oleracea L. (スベリヒユ), native, the others are exotic to Japan
P. pilosa L. (ヒメマツバボタン)
P. quadrifida L. (タイワンスベリヒユ)
Talinum Adans. (ハゼラン)
T. crassifolium Willd. (ハゼラン): exotic
Claytonia L. (ハルヒメソウ)
C. perfoliata Donn ex Willd. (ツキヌキヌマハコベ)
C. sibirica L. (シベリアハルヒメソウ*)
C. virginica L. (ハルヒメソウ)

Portulaca oleracea in Hokkaido

Suberihiyu (スベリヒユ, 滑ヒユ), common purslane
Life form: weedy annual/perennial
Distribution: a widespread weed in cool to tropical regions, while this plant could be used as wild vegetable
Habitat: sunny sites, e.g., crop field, waste ground, roadside verge

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

Photosynthetic type: C4 with CAM (crassulacean acid metabolism)
Chromosome number: 2n = 18, 36 or 54
Use: food containing ω-3 fatty acid
var. sativa (Haw.) DC. (タチスベリヒユ/オオスベリヒユ), cultivated (erect) Hybrid:

P. oleracea L. × P. pilosa L. ssp. grandiflora (Hook.) R. Geesin (ハナスベリヒユ)

[1] a parking lot along a radoside at East Ward in the city of Sapporo on August 30, 2008. [2/3] along a roadside of N26/E1, East Ward, Sapporo, on July 18 2012.

var. sativa

[1/2] under a street tree along a paved road in N16/W4, North Ward, Sapporo, on August 15 2017.