Waterlily dahlia that is a lavender purple on the top of the petals and a darker purple on the underside of the petal.
Dahlia is a genus of bushy, tuberous, herbaceous perennial plants native to Mexico. A member of the Asteraceae [or Compositae], dicotyledonous plants, related species include the sunflower, daisy, chrysanthemum and zinnia. There are 42 species of dahlia, with hybrids commonly grown as garden plants. Flower forms are variable, with one head per stem; these can be as small as 2 in [5.1 cm] diameter or up to 1 ft [30 cm] or “dinner plate”.