MILLER AND STANDLEY—-NORTH AMERICAN NYMPHAEA. 75 
leaves of the two are much alike, so too the flowers, in size at least. The anthers of our 
plant are oblong, while in N. pumila they are cubical. In the European species the 
stigmatic disk is only partially tinged with orange-red, while in our plant the whole 
disk is a dark carmine. 
Michaux, in the original description of the plant, says: ‘‘Quamvis differentiam 
specificam verbis notare non possim; diverse tamen videtur.’’ Evidently he had 
only dried specimens, otherwise it would have 
been very easy to separate it from Nymphaea 
lutea, of which he considered it a subspecies. 
2. Nymphaea rubrodisca (Morong) Greene.' 
Nuphar advena hybrida Peck, Ann. Rep. 
N. Y. Mus. Nat. Hist. 34: 53. 1881. 
Nuphar rubrodiseum Morong, Bot. Gaz. 11: 
167. 1886. 
Nymphaea rubrodisca Greene, Bull. Torrey 
Club 15: 84. 1888; Robins. & Fern. in 
A. Gray, Man. ed. 7. 391. 1908. 
Nymphaea fletcheri Lawson, Proc. & Trans. 
Roy. Soc. Canada 64: 119. 1888. 
Nuphar advena minus Wats. & Coult. in A. 
Gray, Man. ed. 6. 56. 1889, not Morong. 
Nymphaea hybrida Peck, Bull. N. Y. State 
Mus. 6: 75. 1899; Britton, Man. ed. 2. 407. 
1905. 
Type tocauiry: Lake Champlain, Vermont. 
on. ; . di DisTRIBUTION: Quebec and Ontario, through 
Fia. 5. narra rubrodisca, New York and the New England States to 
eastern Pennsylvania and northern New Jer- 
sey, also in eastern Minnesota and western Wisconsin. 
DESCRIPTION. 
Floating leaves 75 to 200 mm. long, 55 to 145 mm. wide, oval or ovate, rounded at 
the apex; sinus about half as long as the midrib or slightly longer, closed or very 
narrow; blades rather thin, glabrous, their lobes oblong-triangular 
or rounded-triangular, obtuse; submersed leaves well developed, 
very thin, crispate, broadly oblong or ovate, broadly rounded and 
retuse at the apex, of about the same size as the floating ones, their 
sinuses broader and more open; rootstocks comparatively slender, 
somewhat flattened, about 25 mm. in their longest diameter, the FG. 6.—Stigmatie 
leaf scars elliptical or oval, 8 to 10 mm. long; flowers 25 to 35 mm. peter “" ayn 
in diameter, 20 mm. high, depressed-globose; sepals usually 5, vetural sive. 
glabrous, rather thin, all similar, oblong or oval or almost orbicular, 
obtuse or truncate, only slightly narrowed at the base; petals spatulate, truncate, 8 or 
9 mm. long; stamens in 4 or 5 rows, their anthers about one-half as long as the filaments, 
sometimes longer, but always shorter than the filaments; sepals canary yellow, with 
or without red on their inner surfaces, the red when present less vivid than in ameri- 
cana; petals clear yellow or slightly tinged with green; stamens yellow, the anthers 
light buff; ovary greenish yellow, lighter than the sepals and stamens, faintly marked 
1 The use of the synonym rubrodisca in place of the original name hAybrida is in ac- 
cordance with article 49 of the Vienna Code. See footnote under Nymphaea micro- 
phylla, p. 72.—G. 8. M. 
