Cosmos bipinnata Cav.

Herbs annual or perennial, 1-2 m tall. Roots fusiform, fibrous, or adventitic near stem base. Stem glabrous or slightly pilose. Leaves secondary pinnatifid, lobes linear or filamentous. Inflorescences solitary, 3-6 cm long. Involucral bracts outer lanceolate or linear-lanceolate, subleathery, pale green, with deep purple stripes. Liguid flowers purplish red, pink or white; Tongue obovate elliptically, 2-3 cm long, 1.2-1.8 cm wide, 3-5 blunt teeth; Tubules yellow, 6-8 mm long, short, upper cylindrical, with drapelike lobes. Achenes dark purple, glabrous, upper end long beaked, with 2-3 sharp spines. Flowering period is From June to August, and fruiting period is from September to October.