Cirsium acaule or acaulon has the English name Dwarf Thistle.

Dwarf Thistle (Cirsium acaule)

Other species, including Dwarf Thistle Cirsium acaule, Musk Thistle Carduus nutans, and Melancholy Thistle Cirsium heterophyllum have also been suggested.

Various herb species include for dwarf thistle Cirsium acaule, chalk milkwort Polygala calcarea, horseshoe vetch Hippocrepis comosa, common thyme Thymus praecox, squinancywort Asperula cynanchica and common rock-rose Helianthemum nummularium.