Nuphar polysepala


Trans. Acad. Sci. St. Louis2: 282. 1865 (as polysepalum)

Synonyms: Nuphar lutea polysepala Nymphaea polysepala
Found in FNA Volume 3.
FNA03 P12 Nuphar pg 69.jpeg
Rhizomes 3-8 cm diam. Leaves mostly floating, occasionally emersed or submersed; petiole terete. Leaf blade abaxially and adaxially green, widely ovate, 10-40(-45) × 7-30 cm, ca. 1.2-1.5 times as long as wide, sinus 1/3-2/3 length of midrib, lobes divergent to overlapping; surfaces glabrous. Flowers 5-10 cm diam.; sepals mostly (6-)9(-12), abaxially green to adaxially yellow, sometimes red-tinged toward base; petals oblong, thick; anthers 3.5-9 mm, slightly shorter than filaments. Fruit green to yellow, cylindric to ovoid, 4-6(-9) × 3.5-6 cm, strongly ribbed, slightly constricted below stigmatic disk; stigmatic disk green, 20-35 mm diam., entire to crenate; stigmatic rays 8-26(-36), linear to lanceolate, terminating within 1(-1.5) mm from margin of disk. Seeds 3.5-5 mm. 2n = 34.

Phenology: Flowering spring (later in north)-summer.
Habitat: Ponds, lakes, and sluggish streams
Elevation: 0-3700 m


B.C., N.W.T., Yukon, Alaska, Ariz., Calif., Colo., Idaho, Mont., Nev., N.Mex., Oreg., Utah, Wash., Wyo.


Plants intermediate between Nuphar polysepala and N. variegata occur in eastern British Columbia.



Facts about "Nuphar polysepala"
AuthorJohn. H. Wiersema + and C. Barre Hellquist +
Elevation0-3700 m +
HabitatPonds, lakes, and sluggish streams +
IllustratorJohn Myers +
PhenologyFlowering spring (later in north)-summer. +
ReferenceNone +
SynonymNuphar lutea polysepala + and Nymphaea polysepala +
Taxon nameNuphar polysepala +
Taxon parentNuphar +
Taxon rankspecies +
VolumeVolume 3 +