Photo: Lilium superbum 1.

Flower and flowerbuds. Gothenburg bot.g., Sweden. Planted. 2007-07-12.

Lilium superbum L.
Engl.: American turk's-cap lily, swamp lily, turk's cap lily.
Deu.: Prächtige Türkenbund-Lilie.
Sven.: drottninglilja, pyramidlilja.
Bot. syn.: Lilium gazarubrum Roane & Henry, Lilium mary-henryae Roane & Henry