the flowers of liatris spicata

inflorescence underground aboveground herbaceous asteraceae lanceolate decreasing wildflower perennial belonging ophiuchus flattened spherical gradually extending obliquely vegetable straight accounts arranged flowers liatris spicata upright conical hualien produce blossom prairie family tubers swells leaves linear bottom curled entire length purple colors flower meadow nature insect willd plant genus shape lower upper dense spike light color small bloom white petal shrub lilac grass base stem pure herb food