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bullhead pond-lily, grand nénuphar jaune, spatterdock, variegated pond-lily, variegated yellow pond-lily, varigated yellow pond-lily, yellow pond-lily

nénuphar à disque rouge

Rhizomes

2.5-7 cm diam.

1-2.5(-4) cm diam.

Leaves

blade abaxially and adaxially green, sometimes abaxially purple-tinged, broadly ovate to oblong, 7-35 5-25 cm, 1.2-1.6 times as long as wide, sinus 1/3-1/2 length of midrib, lobes approximate to overlapping;

surfaces glabrous.

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

2.5-5 cm diam.;

sepals mostly 6, abaxially green to yellow, adaxially usually with red or maroon toward base;

petals oblong, thick;

anthers 3-9 mm, longer than filaments.

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

mostly purple-tinged, ovoid, 2-4.3 2-3.5 cm, strongly ribbed, slightly constricted below stigmatic disk;

stigmatic disk green, rarely reddened, 8-20 mm diam., entire to deeply crenate;

stigmatic rays 7-28, linear to narrowly lanceolate, terminating 0-1(-1.5) mm from margin of disk.

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

2.5-5 mm.

2.5-3.5 mm.

2n

= 34.

Nuphar variegata

Nuphar rubrodisca

Phenology Flowering late spring–summer. Flowering summer.
Habitat Ponds, lakes, sluggish streams, and ditches Ponds, lakes, sluggish streams, sloughs, and occasionally tidal waters
Elevation 0-2000 m (0-6600 ft) 0-400 m (0-1300 ft)
Distribution
from FNA
CT; DE; IA; ID; IL; IN; MA; MD; ME; MI; MN; MT; ND; NE; NH; NJ; NY; OH; PA; RI; SD; VT; WI; AB; BC; MB; NB; NF; NS; NT; ON; PE; QC; SK; YT; SPM
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[BONAP county map]
from FNA
CT; MA; ME; MI; MN; NH; NJ; NY; PA; VT; WI; NB; NS; ON; QC
Discussion

Nuphar variegata is distinct throughout most of its range. The leaves are characteristically floating, being emergent only under low-water conditions. Intermediates between N. variegata and N. microphylla, probably of hybrid origin, are treated as N. rubrodisca. Some intergrading of characteristics occurs where the range overlaps with N. advena (E. O. Beal 1956). This can be observed in the mid-Atlantic region. Intermediates between N. variegata and N. polysepala occur in eastern British Columbia where the two species are sympatric. Authorship and typification of this name were discussed by E. G. Voss (1965).

(Discussion copyrighted by Flora of North America; reprinted with permission.)

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.

(Discussion copyrighted by Flora of North America; reprinted with permission.)

Source FNA vol. 3. FNA vol. 3.
Parent taxa Nymphaeaceae > Nuphar Nymphaeaceae > Nuphar
Sibling taxa
N. advena, N. microphylla, N. orbiculata, N. polysepala, N. rubrodisca, N. sagittifolia, N. ulvacea
N. advena, N. microphylla, N. orbiculata, N. polysepala, N. sagittifolia, N. ulvacea, N. variegata
Synonyms N. americana, N. fraterna, N. lutea subsp. variegata, Nymphaea americana, Nymphaea fraterna N. lutea subsp. rubrodisca, Nymphaea hybrida, Nymphaea rubrodisca
Name authority Durand: in G. W. Clinton, Rep. (Annual) Regents Univ. State New York State Cab. Nat. Hist. 19: 73. 1866 (as variegatum) Morong: Bot. Gaz. 11: 167. 1886 (as rubrodiscum)
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