Rhizomes branched or unbranched, erect, ovoid; stolons slender. Leaves: petiole sparsely to densely puberulent. Leaf-blade abaxially purplish, adaxially green, nearly orbiculate, to ca. 3 × 3 dm, margins spinose-dentate; venation radiate and prominent centrally, without weblike pattern, principal veins ca. 15; surfaces abaxially sparsely to densely puberulent. Flowers emersed, 12-25 cm diam., opening nocturnally, many flowers not closing until late morning, only sepals and outermost petals in distinct whorls of 4; sepals abaxially uniformly green, prominently veined, lines of insertion on receptacle not prominent; petals 16-20, white; stamens ca. 75, yellow, outer with connective appendage projecting less than 2 mm beyond anther; filaments widest below middle, slightly shorter to longer than anthers; pistil ca. 20 (-30) -locular, appendages at margin of stigmatic disk linear, 6-12 mm. Seeds ellipsoid, 1.4-1.8 × 0.9-1.2 mm, ca. 1.5-1.6 times as long as broad, with longitudinal ridges bearing papillae 20-150 µm.

Phenology: Flowering spring–summer.
Habitat: Ponds, ditches, and canals
Elevation: 0-100 m

Distribution

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Introduced; Fla., La., Africa

Discussion

Selected References

None.

Lower Taxa

None.

"dm" is not declared as a valid unit of measurement for this property."um" is not declared as a valid unit of measurement for this property.