Neogene megafossil floras of western North America occasionally include remains of leaves, petioles, rhizomes, and roots of Water Lily and Water Lily-like plants. Most of this material has been assigned to the form genus "Nymphaeites". Recent systematic revisions of numerous fossil assemblages has led to a better understanding of leaf and rhizome morphology, and suggests that much of this material can be reliably assigned to extant genera in the Nymphaeales. As revised, specimens are more properly referable to: Nelumbo, Nuphar, or Nymphaea. Nelumbo is known from nearly complete remains in Reynolds Basin, Id. and as rhizomes in the Stinking Water, Or. flora. It is distinguished by rhizomes with swollen root-bearing nodes, and large centrally peltate (peltate central), orbicular leaves. Nuphar is known from leaves in Trout Creek, Or. and possibly from Eastgate, Nv. It is distinguished by bi-convex leaf scars on the rhizome, and deeply cordate, ovate to oblong leaves with a prominent midrib and pinnate venation. While Nymphaea is known from leaves and rhizomes from Sonoma, Ca., Trapper Creek and Weiser, Id., Buffalo Canyon, Eastgate, Esmeralda, and Middlegate, Nv., Mascall, Stinking Water, Succor Creek, and Trout Creek, Or. It is distinguished by oval leaf scars along the rhizomes and cordate or off-centered peltate (peltate eccentric), orbicular to ovate leaves, with a faint midrib and weakly pinnate to radial venation. Further, pollen assignable to the Nymphaceae is known from Reynolds Basin, Id. and Succor Creek, Or.

Key words: Nelumbo, Neogene, Nuphar, Nymphaea, paleobotany, Water Lilies