Zinnia The ‘Zinnia’ is named after the botanist J.G.Zinn (1727-59). It is any species of the genus Zinnia of the family Asteraceae. The common zinnia of gardens (Z. elegans), called also youth-and-old-age, is a rather coarse, easily cultivated annual, popular as a cut flower for its warm colours—ranging from white and yellow to red and […]