It is closely related to Datura, belonging to the same nightshade family, solanaceae. Brugmansia blooms dangle like great trumpets or bells while Datura blooms stand erect.
This is a mix of Diploid Hemerocallis hybrids. Those Daylilies can yield large to small sized flowers, of red, pink, cream, yellow, orange, fragrant or not, trumpet-shaped or spider.