About Nuphar variegata Engelm. ex Durand
Nuphar variegata Engelm. ex Durand is a rhizomatous, perennial aquatic herb. Its rhizomes measure 2.5–7 cm wide. The species produces both submerged and floating leaves, with most leaves being floating. Submerged leaves range from 7–35 cm long and 5–25 cm wide, and the leaf petiole is flattened. Its yellow flowers are 2.5–5 cm wide, and either float on the water surface or extend above it. Flowers have 6 yellow sepals that enclose small petals. The gynoecium is made up of 7–28 carpels. The stigmatic disk, which measures 8–20 mm wide, is green to yellow, very rarely red, and has 7–28 stigmatic rays. The fruit is fleshy, ovoid, strongly ribbed, 2–4.3 cm long and 2–3.5 cm wide, and bears seeds 2.5–5 mm long. This species grows in ponds, lakes, streams, and rivers in water up to 2 meters deep.
