8 Water Lily Family. 



our spscies. Fruit iodehiscent. S3eds enclose! in pulpy ariU or naked. 



Brasenh. Sepals and petals 3; stamens 1*2-18; leaves peltate. 



Nelqmbo. Sepals about 4-5; petals numerous; carpels 1-ovuled, separately immersed in 



the top of an obeonical receptacle. 

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

 Nuphar. Petals small, stamen-like; stamens hypogynous. 



BRASENIA Schreber. Stems branching, slender, lengthy, from creeping 

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

 petioled, floating. Carpels 4-18, separate, indehiscent, 1-2-seeded. 



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

 purple, long-pertuncled; fruit oblong. Ponds; rare; Museitine and Story 

 counties. ( B. purpurea ( Mx. ) Casp. ) 



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

 ers very large. 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 Nelwnbo, Leaves much above water, 

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

 1-3 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. 



NYMPHAEA L. Water Lily. Flowers large, 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. Stvcet-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 6 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 specias. ( Cnstalln odorata ( Dryand.) W. & W.) 



N. reniformis DC. Tuber-hearing W. L. Rootstock with numerous 

 detatchable tubers by means of which the plant propagates; leaves 'reinform, 

 orbicular, larger than the preceeding, 8-15 inches wide, green both 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. tuberosa 

 ( Paine ) Greene.) 



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

 Flowers yellow. Sepals 5 or 6, greenish outward, roundish or concave. 

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

 Bhort, inserted with the petals on the receptacle; stigmas united into a radiate 

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



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

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



