Nuphar rubrodisca


Bot. Gaz. 11: 167. 1886 (as rubrodiscum)

Common names: Nénuphar &agrave disque rouge
EndemicSelected by author to be illustrated
Synonyms: Subspecies (Morong) Hellquist & WiersemaSpecies PeckSpecies (Morong) Greene
Treatment appears in FNA Volume 3.
Click plate for higher resolution version.
Rhizomes 1-2.5(-4) cm diam. Leaves mostly floating, occasionally submersed; petiole flattened. Leaf blade often abaxially purple on new leaves, adaxially green to greenish purple, broadly ovate to oblong, 5-25 × 4.5-15 cm, 1.1-1.7 times as long as wide, sinus ca. 1/2 length of midrib, lobes overlapping to divergent and forming V-shaped angle; surfaces glabrous. Flowers 3 cm or more diam.; sepals 5-6, abaxially green to yellow, adaxially often red-tinged toward base; petals broadly spatulate and thin, or notched and thickened; anthers (2-)3-6 mm, shorter than filaments. Fruit purple, dark brown, or rarely green, globose-ovoid, occasionally flask-shaped, 1.5-2.5 cm, strongly ribbed, deeply constricted below stigmatic disk, constriction 5-10 mm diam.; stigmatic disk red, 8-14 mm diam., with 8-14 shallow crenations; stigmatic rays 8-15, linear, terminating 0-1.6 mm from margin of disk. Seeds 2.5-3.5 mm.

Phenology: Flowering summer.
Habitat: Ponds, lakes, sluggish streams, sloughs, and occasionally tidal waters
Elevation: 0-400 m


V3 76-distribution-map.gif

N.B., N.S., Ont., Que., Conn., Maine, Mass., Mich., Minn., N.H., N.J., N.Y., Pa., Vt., Wis.


Nuphar rubrodisca is generally considered to be a hybrid between N. microphylla and N. variegata because it displays characteristics intermediate between the two taxa. It is reportedly sterile in some areas and completely fertile in others.



Lower Taxa

No lower taxa listed.

Facts about "Nuphar rubrodisca"
AuthorJohn. H. Wiersema + and C. Barre Hellquist +
AuthorityMorong +
Common nameNénuphar &agrave + and disque rouge +
DistributionN.B. +, N.S. +, Ont. +, Que. +, Conn. +, Maine +, Mass. +, Mich. +, Minn. +, N.H. +, N.J. +, N.Y. +, Pa. +, Vt. + and Wis. +
Elevation0-400 m +
HabitatPonds, lakes, sluggish streams, sloughs, and occasionally tidal waters +
IllustratorJohn Myers +
PhenologyFlowering summer. +
Publication titleBot. Gaz. +
ReferenceNone +
Source xml grained fna xml/V3/V3 76.xml +
Special statusEndemic + and Selected by author to be illustrated +
SynonymsSubspecies + and Species +
Taxon familyNymphaeaceae +
Taxon nameNuphar rubrodisca +
Taxon parentNuphar +
Taxon rankspecies +
VolumeVolume 3 +