Var. mìnor, Sims., with leaves only 2–5´ and flowers 2–3´ broad.—Shallow water, in cold bogs and in sandy soil.
2. N. renifórmis, DC. (Tuber-bearing W.) Leaves reniform-orbicular, mostly larger (8–15´ wide) and more prominently ribbed than the last, rarely purplish beneath; rootstock bearing numerous spontaneously detaching often compound tubers; flower scentless (or with a slight odor as of apples), white, never pinkish, 4½–9´ in diameter, the petals proportionally broader and blunter than in n. 1; the fruit more depressed, and with fewer but much larger (i.e. twice as broad) globular-ovoid seeds, which when mature are barely enclosed by the aril and not stipitate. (N. tuberosa, Paine.)—Lakes, slow rivers, etc., western N. Y. (from Oneida Lake, Paine) and near Meadville, Penn., to Mich., E. Neb., and probably in the Southern States. July–Sept.
5. NÙPHAR, Smith. Yellow Pond-Lily. Spatter-Dock.
Sepals 5, 6, or sometimes more, colored, or partly green outside, roundish, concave. Petals numerous, small and thickish, stamen-like or scale-like, inserted with the very numerous short stamens on the receptacle under the ovary, not surpassing the disk-like 8–24-rayed sessile stigma, persistent and at length recurved. Fruit ovoid, naked, usually ripening above water. Aril none.—Rootstock creeping, cylindrical. Leaves with a deep sinus at the base. Flowers yellow or sometimes tinged with purple, produced all summer. (Name said to be of Arabic origin.)
1. N. ádvena, Ait. f. Sepals 6, unequal; petals shorter than the stamens and resembling them, thick and fleshy, truncate; stigma nearly entire, 12–24-rayed, pale red; ovary and fruit (1½´ long) ovate, not contracted above into a narrow neck; thin submersed leaves seldom present; floating or emersed and erect leaves thick (6–12´ long), from roundish to ovate or almost oblong, the sinus open, or closed or narrow.—Very common, in still or stagnant water; stout and coarse; flower often partly purplish (var. variegàtum, Engelm.).
Var. mìnus, Morong. More slender; leaves somewhat smaller (3–8´ long); flowers usually smaller (sepals 12–15´´ long); petals spatulate; stigmas 9–13-rayed, crenately toothed, bright red or crimson; fruit 1´ long, contracted above. (N. rubrodiscum, Morong. N. luteum, Man.; not Smith.)—N. Vt. to Mich. and Penn. Probably a hybrid between this and the next species.
2. N. Kalmiànum, Ait. Very slender and with slender rootstock; submersed leaves thin, round-reniform, the floating broadly elliptical with a deep narrow sinus, 2–4´ long; sepals usually 5, the flowers an inch broad or less; petals spatulate or obovate; stigmas 7–10-rayed, dark red; fruit globular with a short neck (6–9´´ in diameter). (N. luteum, var. pumilum, Man.)—Maine to Penn. and Minn., and northward.
3. N. sagittifòlium, Pursh. Rootstock stout; leaves narrowly oblong to oblong-lanceolate with a short sinus, 6–15´ long; flowers small (1´ broad).—S. Ind. and Ill. (Schneck), and southward.
Order 7. SARRACENIÀCEÆ. (Pitcher-Plants.)
Polyandrous and hypogynous bog-plants, with hollow pitcher-form or trumpet-shaped leaves,—comprising one plant in the mountains of Guiana, another (Darlingtonia, Torr.) in California, and the following genus in the Atlantic United States.