clasping coneflower (rudbeckia amplexicaulis). budding capitulum closeup

asteraceae belarus flora compositae dracopis amplexicaulis rudbeckia anthesis black background botanical science botany capitulum clasping coneflower closeup floret flower focus stacking head herbaceous inflorescence involucral bract involucre lanceolate ligulate ligule linear macro nature peduncle phyllary plants radiate ray virtual herbarium ovoid conical