flax-leaf fleabane (erigeron bonariensis). inflorescence detail closeup

anthesis argentine fleabane asteraceae asthma weed belarus flora black background botanical science botany capitulum closeup compositae conyza bonariensis disc floret erigeron flaxleaf flower focus stacking inflorescence hairy horseweed head indumentum involucral bract involucre ligulate ligule macro nature panicle paniculiform peduncle phyllary plants racemiform ray strigillose synflorescence tubular virtual herbarium wavyleaf