S Water Lilt Family. 



our spacies. Fruit indehiscent. Sieds enclosed iu pulpy arils or naked. 



Hkasknlv. Sepals and petals 3; stamens 12-18; leaves peltate. 



NELUMBO. Sepals about 1 r>; petals numerous; carpels 1-ovuled. separately immersed in 



the top of an obconioal receptacle. 

 Nvmphaea. Petals large, adnate to the ovary ; stamens from the summit of the ovary. 

 Ncphar. Petals small, stamen- like; stamens nypogynous. ' 



BRASENIA Sehreber. Stems branching-, slender, lengthy, from creeping 

 rootstocks. Leaves alternate, oval, centrally peltate, palmately veined, long- 

 pettoled, floating". Carpels 4-18, separate, intlehiscent, 1-2-seeded. 



B. peltGta Pursh. Leaves oval, entire, 1-3 feet across; flowers small, dull- 

 purple, long-peduucled: fruit oblong". Ponds; rare; Muscatine and Story 

 counties. ( Ii. purpurea ( Mx. ) Casp. ) 



NELUMBO Adans. Rootstock tuberous. Leaves centrally peltate. Flow- 

 ers very larg-e. Sepals 4-6. Petals many, in several rows. Stamens indefi- 

 nite. Sepals, petals, and stamens passing- gradually into each other. Petals 

 and stamens inserted on the calyx, caducous. Carpels many, distinct, con- 

 tained in pits in the large convex top-shaped receptacle. 



N. lutea ( Willd. ) Pers. Yellow Nclumbo. Leaves much above water, 

 large, with a cupped or depressed center or else floating* and plane, circular, 

 1-2 feet in diameter; flowers pale yellow, 5-10 inches broad; tubers and seed 

 edible. Sloughs of the Mississippi and Missouri rivers and interior lakes; 

 July-August; frequent: Allamakee, Clayton, Muscatine, Louisa, Des Moines, 

 Henry, Iowa, and Monona counties. 



NYMPrJAEA L. Water Lily. Flowers larg-e, white or pinkish. Sepals 

 4-5, green outwardly. Petals numerous, in many rows, gradually passing into 

 the stamens. Stamens very numerous, inserted on the ovary. Ovary 12-3"- 

 celled. Fruit depressed globular, covered with the bases of decaying petals, 

 maturing- under water. 



N. odorata Ait. Sweet-scented W. L. Rootstock with a few persistent 

 branches: leaves orbicular, entire, cleft at the base to the insertion of the 

 petiole, usually purplish beneath; stipules broadly triangular to kidney- 

 shaped, notched at the apex; flowers usually white, sometimes pinkish, very 

 fragrant, large, frequently inches in diameter, opening in the morning and 

 closing in the afternoon; petals narrowly Oblong, obtuse. Ponds; June- 

 September; infrequent; range rather uncertain as it has been confused with 

 the following species. ( Castalia odorata ( Dryand.) W. & W.) 



N. re ni form is DX Tuber-hearing W. L. Rootstock with numerous 

 detatchab^e tubers by means of which the plant propagates; leaves reinform, 

 orbicular, larger than the preceeding. 8-15 inches wide, green bcth sides, ribs 

 prominent; flowers very large, scentless or nearly so, white; petals oblong, 

 broader than those of the preceeding species. Ponds: July-September: infre- 

 quent; widely distributed; Muscatine, Linn, Story, Hamilton, Cerro Gordo, 

 Winnebago, Hancock, Lyon, Emmet, and Fremont counties. (C. tuberom 

 ( Paine ) Greene.) 



NUPHjAR. Smith. Yellow Pond Lily. Rootstock creeping, cylindrical, 

 1' lowers yePow. Sepals 5 or 0. greenish outward, roundish or concave. 

 Petals numerous, small, thick, stamen-like or scale-like. Stamens numerous, 

 short, inserted with the petals en the receptacle; stigmas united into a radiate 

 disc. Fruit ovoid, naked, usually ripening above water. 



N. ad vena Ait. f Leaves floating, emersed or erect, thick, orbicular, 

 entire, palmately veined, base deeply heart-shaped: sepals 6, oblong, 



