Nuphar rubrodisca

Morong

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

Common names: Nénuphar &agrave disque rouge
Synonyms: Nuphar lutea rubrodisca Nymphaea hybrida Nymphaea rubrodisca
Found in FNA Volume 3.
FNA03 P12 Nuphar pg 69.jpeg
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

Distribution

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

Discussion

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.

References

None.

Facts about "Nuphar rubrodisca"
AuthorJohn. H. Wiersema + and C. Barre Hellquist +
Common nameNénuphar &agrave + and disque rouge +
Elevation0-400 m +
HabitatPonds, lakes, sluggish streams, sloughs, and occasionally tidal waters +
IllustratorJohn Myers +
PhenologyFlowering summer. +
ReferenceNone +
SynonymNuphar lutea rubrodisca +, Nymphaea hybrida + and Nymphaea rubrodisca +
Taxon nameNuphar rubrodisca +
Taxon parentNuphar +
Taxon rankspecies +
VolumeVolume 3 +