Northern Prairie Wildlife Research Center
Aquatic and Wetland Vascular Plants of the Northern Great Plains
Nymphaea L. -- Water Lily
Large flowered plants from stout rhizomes, these sometimes with lateral tubers.
Leaf blades nearly always floating, seldom some emersed, rotund or nearly
so, with a narrow V-shaped sinus behind the petiole attachment to the blade;
petioles not flattened or winged. Flowers white and showy, 7-25
cm across, usually opening in morning and closing in afternoon, remaining open
on cool days; sepals 4, greenish; petals numerous and overlapping,
white, gradually passing into the stamens; stamens numerous, the outer
ones with broadened, petaloid filaments, anthers yellow, the spiral of petals
and stamens encroaching up the sides of the ovary so that the flower is nearly
epigynous; ovary concave at its summit with a rounded protuberance projecting
from the center, stigmas usually 10-25, radiating from the center, overarched
by finger-like projections around the margin of the stigmatic disk. Fruit
subglobose, covered with the persistent petal and stamen bases, maturing under
water; seeds numerous, each enveloped by a saclike aril.
||Petals elliptic, broadest near the middle, tapered
to a subacute tip; flowers usually fragrant; rhizome lacking tubers.
||Petals oblanceolate to spatulate, broadest above
the middle, obtuse to rounded at the tip; flowers scarely if at all
fragrant; rhizome with lateral tubers.
7. Nymphaeaceae, the Water Lily Family
2. Nymphaea L. -- Water Lily
- 1. Nymphaea odorata Ait. -- Fragrant
white water lily
- 2. Nymphaea tuberosa Paine --
White water lily
Return to Family -- Nymphaeaceae - The Water Lily
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