Cirsium acaule
Cirsium acaule - varretu karuohakas Keilas.jpg
Cirsium acaule/acaulon (Dwarf Thistle)
Scientific classification edit
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Asterids
Order: Asterales
Family: Asteraceae
Genus: Cirsium
C. acaule
Binomial name
Cirsium acaule
(L.) A.A.Weber ex Wigg. 1780 not Scop. 1780 nor Ledeb. 1833[1]
  • Carduus acaulis L.
  • Carduus caulescens Pers. ex Steud.
  • Carduus gmelini Steud.
  • Carduus rosenii Vill.
  • Carduus spinosus Gueldenst. ex Ledeb.
  • Cirsium allionii Spenn.
  • Cirsium alpestre Nägeli
  • Cirsium bipontinum F.W.Schultz
  • Cirsium consanguineum DC.
  • Cirsium decipiens Nyman
  • Cirsium decoloratum W.D.J.Koch
  • Cirsium exigium Bubani
  • Cirsium fallax Franch.
  • Cirsium lachenalii W.D.J.Koch
  • Cirsium rosenii Vill.
  • Cirsium sorocephalum DC.
  • Cnicus affghanicus C.Winkl. ex Petr.

Cirsium acaule or acaulon has the English name dwarf thistle or stemless thistle. It is widespread across much of Europe.[2] It is often found on short, calcerous grasslands.


Cirsium acaule is a perennial herb. The leaves are a spreading rosette, spiny, 10 to 15 cm long.

There is usually only one flower head, although there can sometimes be 2 or 3. Usually it is not stalked from the leaf rosette. The flower head is 3 to 4 cm long, the florets are red/purple. They flower from June to September.[3]


  1. ^ a b The Plant List, Cirsium acaule (L.) A.A.Weber ex Wigg
  2. ^ Altervista Flora Italiana, Cardo nano, Cirsium acaule includes photos and European distribution map
  3. ^ Rose, Francis (1981). The Wild Flower Key. Frederick Warne & Co. pp. 382–383. ISBN 0-7232-2419-6.