background circle cluster flower group head pattern plant Sardinia symmetrical symmetry texture umbel umbellifer white alpine Austria blue bud dainty delicate flowers gentian Gentiana gentians montane patch petal petals small spring tiny wild bunch english garden innocence innocent natural nature purity rosa rose summer bloom blossom crowd cultivar Dianthus England many pink profusion blooms bush compete competition flowerhead flowerheads hydrangea shrub Sussex apple Great Britain Hampshire Malus stamens tree daisies daisy yellow altitude canada high little minute mountain Rockies Rocky Mountains annual bright composite flower flora florets helianthus annuus inflorescence kernels large large head popular seeds spiral spiralling florets sunflower widespread campion carpet Caryophyllaceae moss campion Silene acaulis