Rhizomes unbranched, erect, cylindric; stolons absent. Leaves: petiole glabrous. Leaf blade abaxially green to deep purple, adaxially green, ovate to elliptic, 3-19 × 2-15 cm, margins entire; venation radiate centrally, without weblike pattern, principal veins 7-13; surfaces glabrous. Flowers floating, 3-7.5 cm diam., opening and closing diurnally, only sepals and outermost (occasionally innermost) petals in distinct whorls of 4; sepals uniformly green, obscurely veined, lines of insertion on receptacle not prominent; petals 8-15, white; stamens 20-40, yellow, connective appendage projecting less than 0.2 mm beyond anther; filaments widest above middle, much longer than anthers; pistil 5-12-locular, appendages at margin of stigmatic disk tapered or slightly boat-shaped, 0.6-1.5 × 0.8-1.4 mm. Seeds ovoid, ca. 2-3 × 1.5-2 mm, ca. 1.3-1.5 times as long as broad, lacking papillae on surface.
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