astilbe thunbergii 'professor van der wielen' features dark green leaves and large, loose, weeping panicles o

astilbe thunbergii professor van der wielen arching attractive bloom blooming botanic botanical botany bright close closeup dense detailed flora floral flowering flowers foliage garden gardening growing growth hybrid large leaves loose macro nature ornamental outdoors panicles park petals plant plumes summer summertime vegetation weeping white 'professor wielen' features mound dark green stems late spring early