dandelion pappus flower structure

abundant anemochoral anemochory anther asteraceae ball bloom blossom calyx common corolla cypsela cypselae dandelion dispersal dmuchawiec floret flower fluff fruits grass herb herbaceous kernel kielichowy mature medical nie officinale ovary pappi pappus perennial plant puch puff ripe seed spring structure sun sunny taraxacum upki weed white wildflower wind