Perennial subspecies of the Asteraceae family, Carlina acaulis ssp. simplex is distinguished from the type subspecies by its distinctly more erect habit, developing a well-marked floral stem that can reach 30 to 50 cm in height. It shares with the acaulis form a distribution centered on the mountains of central and southern Europe, where it occupies the same dry calcareous grasslands, rocky pastures, and open heaths, between approximately 500 and 2,000 meters.
The basal leaves are deeply pinnatilobate, spiny, of a grayish-green, arranged in a rosette less pressed to the ground than in the acaulis subspecies. The stem bears a single capitulum, 5 to 8 cm in diameter, crowned with the same silvery white internal bracts with pearly reflections characteristic of the genus, very ornamental in low light.
This erect habit, which raises the capitulum above the foliage, gives this subspecies a different readability in the landscape and in the garden, while retaining the architectural aspect typical of carlines.
In its natural habitat, its flowering extends from July to September. In cultivation, it blooms at the same times.
The cultural requirements remain identical to those of the species: well-drained soil, poor to moderately fertile, preferably calcareous, in full sun. It is particularly suitable for sloping rock gardens and gravel gardens where its slender habit can be fully expressed.