Perennial herb to 60 cm tall, aromatic, hairy. Stems erect, much-branched. Leaves once or twice divided, to 8 cm long, primary segments to 3.5 cm long and ovate to elliptic, petiolate. Capitula 5-25 in corymbs, to 2 cm across; summer. Ray florets white. Achenes about 1.5 mm long. Pappus a minute lobed crown. [Matricaria parthenium L., Chrysanthemum parthenium (L.) Bernh., Pyrethrum parthenium (L.) Sm.]
SE Europe, Caucasus
T. corymbosum (L.) Sch. Bip. from E Europe is an erect perennial herb with once divided leaves, radiate capitula in corymbs and white ray florets. [Chrysanthemum corymbosum L., Pyrethrum corymbosum (L.) Willd.]
Source: (2002). Dahlia. 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.