pyrethrum

Pyrethrum (scientific name: Pyrethrum cinerariifolium Trev.) is compositae, chrysanthemum is a perennial herb, up to 60 cm tall.
Rhizomes short.
Stems erect, base leaf flowering, ovate or elliptic, 2 split back to pinnate.
Once for all, lateral lobes ovate or elliptic;
All leaf petiole, base under two silver and a solitary flower head stalk or cauline, formed a loose umbrella inflorescence.
Bracts full of the total bracts lanceolate, outer hard quality, ligulate flowers white, the top of the tongue flat or slightly concave.
Ligule achene rib often focused on achene ventral surfaces.
5 - in August.