structure of flower of sunflower in cross section. diagram of flower head or pseudanthium. parts of sunflower with titles

actinomorphic anatomy angiosperm anther background biology botanical botany capitulum composite corolla cross cut diagram english filament flora flower head illustration inflorescence involucral isolated morphology ovary ovule part parts petal phytomorphology pistil plant pseudanthium scheme section sepal stamen stigma structure sunflower title vector white zygomorphic