WATER-LILY FAMILY 



YELLOW POND-LILY. SPATTER-DOCK 



Nuphar ddvena. Nymphaa ddvena 



Nuphar, said to be of Arabic origin. 



Perennial. A stout water plant with large, thick 

 leaves, floating, emersed, or erect; bearing large, coarse, 

 yellow flowers, found in still water, ponds, or slow streams. 

 New Brunswick and Nova Scotia to Florida, westward to 

 Texas and the Rockies. July-September. 



Rootstock. — Cylindrical, creeping; anchored in the 

 mud. 



Stem. — Large, coarse, smooth. 



Leaves. — Tough, leathery, floating or erect or emersed, 

 six to twelve inches long, broad oval or ovate, heart- 

 shaped or deeply cleft at base, entire. 



Flowers. — Yellow, often greenish outside, rarely purple- 

 tinged, depressed globular in shape, two to three inches 

 across. 



Calyx. — Of six yellow sepals, concave, thick, fleshy, 

 unequal in size. 



Corolla. — Petals many, stamen-like, oblong, fleshy, 

 short. 



Stamens. — Many, shorter than the petals and packed 

 in five to seven rows around the ovary, from which they 

 radiate and recurve, filling up the flower-cup. 



Pistil. — Ovary depressed globular, compounded of 

 many carpels; the stigmatic disk, pale red or yellow with 

 twelve to twenty rays. 



Fruit. — Of many carpels, ovoid. 



Pollinated by beetles, bees, and flies; nectar-bearing. 

 Stigma rays begin to mature a short time before the an- 

 thers, so that both cross and self-fertilization is possible. 



The Yellow Pond-Lily dwells in a world of muddy 

 bottoms and sunny exposures, and in quiet waters 



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