Photo: Pelargonium tetragonum 3.

Flowers and stems. Brussels bot.g., Belgium. Greenhouse. 2008-06-05.

Pelargonium tetragonum (L. f.) L'Hér.
Engl.: square-stack cranesbill, square-stem pelargonium.
Sven.: fyrkantspelargon.
Bot. syn.: Geranium tetragonum L. f.