Compilation
Nuphar polysepala

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Name

Identification
Nuphar polysepala Engelm. [family NYMPHAEACEAE ] (stored under name); Nuphar pictum Parry [family NYMPHAEACEAE ]
Related name
  • Nuphar pictum
  • Nuphar polysepala
  • Nuphar luteum

Flora

Entry for Nuphar polysepala Engelmann [family NYMPHAEACEAE]
Herbarium
Flora of North America (FNA)
Collection
Flora of North America
Resource Type
Reference Sources
Entry From
Flora of North America, Vol 3,
Names
Nuphar polysepala Engelmann [family NYMPHAEACEAE], Trans. Acad. Sci. St. Louis, 2: 282. 1865 (as polysepalum)
Nuphar lutea (Linnaeus) Smith subsp. polysepala (Endelmann) E. O. Beal [family NYMPHAEACEAE]
Nymphaea polysepala (Engelmann) Greene [family NYMPHAEACEAE]
Information
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
Altitude range
0-3700 m
Distribution
USA AlaskaUSA Ariz.USA Calif.USA Colo.USA IdahoUSA Mont.USA Nev.USA N.Mex.USA Oreg.USA UtahUSA Wash.USA Wyo.Canada B.C.Canada N.W.T.Canada Yukon
Discussion
Plants intermediate between Nuphar polysepala and N. variegata occur in eastern British Columbia.

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