the white flowers of aster hispidus

inflorescence centimeters millimeters herbaceous asteraceae wildflower perennial prominent flowering september hispidus vertical hairless diameter solitary arranged umbrella fruiting flowers spindle reaches texture lateral tubular achenes blossom prairie genera shaped height leaves sparse midrib branch tongue length flower oblong period august meadow yellow nature white aster thunb plant roots hairs sides edges veins shape crown daisy petal grass field stem garden popular science knowledge botany biology