flax-leaf fleabane (erigeron bonariensis). flowering capitulum closeup

anthesis argentine fleabane asteraceae asthma weed belarus flora biseriate black background botanical science botany bract capitulum closeup compositae conyza bonariensis costate disc floret erigeron filiform flaxleaf flower focus stacking foliaceous hairy horseweed head herbaceous hispidulous indumentum inflorescence involucral involucre ligulate ligule macro nature peduncle phyllary plants ray subulate tubular virtual herbarium wavyleaf