Genus species (Plantae): Chamaenerion angustifolium

Chamaenerion angustifolium, known in North America as fireweed, in some parts of Canada as great willowherb, in Britain and Ireland as rosebay willowherb, and traditionally known as Saint Anthony's Laurel amongst other variants, is a perennial herbaceous flowering plant in the willowherb family Onagraceae. It is also known by the synonyms Chamerion angustifolium and Epilobium angustifolium. It is native throughout the temperate Northern Hemisphere, including large parts of the boreal forests.

Alexander Humboldt's expedition across the Russian steppes in 1829:

"There was a beauty in this emptiness. The summer blossom had turned the plains into a sea of reds and blues. Humboldt saw the tall candle-like reddish spikes of willow herb (Epilobium angustifolia) and the bright blues of delphiniums (Delphinium elatum). Elsewhere the colour came from the vivid reds of Maltese Cross (Lychnis chalcedonica) which seemed to set the steppes on fire, but there were still few wild animals and birds."

Reference: Wikipedia
Book reference: The Invention of Nature: Alexander von Humboldt's New World, by Andrea Wulf, p.207. (2015).