Gentiana clusii (Gentiana clusii)

Gentiana clusii (sometimes called "Clusius' gentian") is a large-flowered, short-stemmed gentian, which is very similar to G. acaulis. The two species differ in the presence (G. acaulis) or absence (G. clusii) of green stripes inside the corolla, by the shape of the corners between the petals (pointed in G. clusii, more rounded in G. acaulis), but mostly in their ecology, with G. clusii preferring limestone areas, and G. acaulis being found over silicaceous rocks.

Like G. acaulis, G. clusii is found in the Pyrenees, Alps, Apennines, Jura, Black Forest and the Carpathians.

G. clusii is named after Charles de l'Écluse (Carolus Clusius), one of the earliest botanists to study the alpine flora.