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