Herb to 150 cm tall, hairy above. Stems solitary, branched, more or less erect. Leaves only along stems, toothed. Capitula 1-15 in corymbs at apex of stems; summer. Ray florets with ligules about 5 mm long, white.
Most of Europe
Other white-flowered species include:
A. ageratifolia (Sibth. & Sm.) Boiss. from the Balkan Peninsula, which has solitary capitula and long ligules;
A. clavennae L. from the European Alps and the Balkans, which is a silky-hairy herb with 6-25 capitula in corymbs, and long ligules;
A. umbellata Sibth. & Sm. from Greece which is a small woolly herb with mostly basal leaves and corymbs of usually only 3-6 capitula.
Source: (2002). Asteraceae. In: . Horticultural Flora of South-eastern Australia. Volume 4. Flowering plants. Dicotyledons. Part 3. The identification of garden and cultivated plants. University of New South Wales Press.
Flowers double, button-like, white, in branching heads. ['Boule de Neige', 'Schneeball']