783 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 
3. Nymphaea americana (Provancher) Miller & Standley. 
Nuphar americana Provancher, Fl. Canad. 29. 1862, excluding synonyms. 
Nuphar variegatum Engelm.; Peck, Ann. Rep. Univ. N. Y. 19:73. 1866. 
Nuphar advena variegatum Engelm. in A. Gray, Man. ed. 5. 57. 1867. 
Nuphar advena minor Mo- 
rong, Bot. Gaz. 11: 167. 
1886. 
Nymphaea variegata G. 8. 
Miller, Proc. Biol. Soc. 
Washington 15: 13. 
1902. 
‘‘Nymphaea advena So- 
land.’’ Small, Fl. South- 
east. U. 8, 456. 1903, in 
part; Britton, Man. ed. 
2. 407. 1905, in part. 
Nymphaea advena variegata 
Fernald, Rhodora 10: 
49. 1908. 
TYPE LocaALiTy: Lake St. 
Jean-Georgie, Quebec. 
DIsTRIBUTION: Eastern 
Canada westward to British 
Columbia, south to Montana, 
Nebraska, northern Indiana, 
and Ohio, eastern Pennsyl- 
vania, and New Jersey. 
DESCRIPTION. 
Floating leaves usually 17 
to 28 cm. long and 11 to 22 
cm. wide, oblong or oval, the 
blades averaging narrower 
and smaller than in advena, slightly but noticeably narrowed towards the apex, 
the sinus 50 to 75 mm. deep, closed or very narrow, the lobes semiorbicular or 
oblong; submersed leaves sometimes but not always present, similar in form to 
the floating ones but broader, very thin and membranous; petioles slender, con- 
spicuously flattened, with a conspicuous median ridge form- 
ing a prolongation of the midrib; peduncles terete, slender, 
glabrous; flowers about 45 mm. in diameter, 30 mm. high, the 
perianth when spread measuring about 100 mm., in other 
particulars similar to those of advena; petals about 16, the 
largest 8 mm. wide at the apex and sometimes almost spatu- 
late; stamens usually in 6 rows, about 26 to the row; filaments Fic. 9.—Stigmatic pat- 
often 4 mm. wide; color of flowers variable but usually quite tern of Nymphaea 
distinct from that of N. advena; outside of outer sepals oil Sue Natural 
green, the inner ones lemon yellow outside; lower half of , 
‘inner surface of all sepals usually, although not invariably, red, this color some- 
times covering the whole inner side of the smaller sepals, the exact shade varying in 
different specimens from a mere indefinite tinge in the yellow to a bright pure maroon; 
petals clear yellow or sometimes bright parrot green, usually tipped with green, and 
Fia, 8.—Leaf outline of Nymphaea americana. Seale, }. 
