great mulein plant in winter sunlight - verbascum thapsus

background bokeh botanical botany copyright creamy dormancy dye environment essential flavonoids flora floral flower flowers focus gentbrugse glycosides great green invasive iridoid kristof lauwers leaf leafs leaves lignin medicinal medicine meersen mucilage mulein nature oil oils pioneer plant polysaccharides rosette saponins selective stem sun sunlight sunny tannins thapsus verbascum weed weedy wildflower winter