Folk names: oil color, gold color, solstice, flower of the dead. Parts used: flowers and inflorescences. Pharmacy name: flowers of marigolds - Caleridulae flos (earlier: Flores Calendulae sine Calycibns). Botanical description. Annual plant, reaching 70 cm in height. Straightened felt-ploughed stem is branched out and carries the next, also thinly pubescent leaves. Bright yellow inflorescences-baskets are quite large, their diameter sometimes exceeding 4 cm. Blossoms from June to October. It grows as an ornamental plant in gardens and a medicinal plant in cultural plants. Sometimes it is wild from there. Collection and preparation. The inflorescences should be collected in a fully open condition in very dry weather and dried quickly in a ventilated place, but without artificial heating. Use only tongue flowers, or all the inflorescence (more often in folk medicine). Effective substances: essential oil, marigold boots, saponins, glycosides, carotenoids, xanthophylls, bitterness, mu