Are Leontopodium and Sandersonia both native to Europe?
Sandersonia Sandersonia is a rhizomatous plant genus native to South Africa (the Cape Provinces, KwaZulu-Natal and the Northern Provinces) and Swaziland, part of the family "Colchicaceae". It has only one species, Sandersonia aurantiaca. It is also called Christmas bells, golden lily of the valley or Chinese lantern lily or Chinese lantern bulb "S. aurantiaca" is a perennial plant and a climber that can reach 30 inches in height. The flowers are yellow or orange.
Centaurea montana Centaurea montana (perennial cornflower, mountain cornflower, bachelor's button, montane knapweed or mountain bluet) is a species of "Centaurea" endemic to Europe. It is widespread and common in the more southerly mountain ranges of Europe, but is rarer in the north. It escapes from gardens readily, and has thereby become established in the British Isles, Scandinavia and North America.