flowers garden pasque pendulant Pulsatilla red spring Cerinthe green hanging natural nature Spain wild Carex pendula deciduous England english Great Britain pendulous sedge stream Sussex trees water woodland catkins Corylus dangle hang hazel suspended tree border bulb Galtonia perennial petals plants stems summer white black Cruciferae dye herb Isatis tinctoria plant purple seeds traditional Woad bulbs drooping Fritillaria fritillary pendant flower head Leucojum spring snowflake winter alpine dolomites droop frilled Italy montane mountain Ranunculaceae snowbell Soldanella early shake tassels branches Davidia Davidiaceae dove tree fruit ghost tree nut Nyssaceae pocket handkerchief tree