Flora of North America species comparison

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Nuphar advena

immigrant pond-lily, spatterdock, yellow pond-lily
Rhizomes

mostly 5-10 cm diam.
Leaves

blade abaxially and adaxially green, broadly ovate to nearly orbiculate, 12-40 - 7-30 cm, 1-2 times as long as wide, sinus 1/3-1/2 length of midrib, lobes overlapping to divergent, often forming angle of 90° or greater;

surfaces abaxially glabrous to sparsely pubescent.
Flowers

to 4 cm diam.;

sepals mostly 6, abaxially green to adaxially yellow, rarely red-tinged toward base;

petals oblong, thick;

anthers 3-7 mm, longer than filaments.
Fruit

green, ovoid, 2-5 × 2-5 cm, moderately ribbed, slightly constricted below stigmatic disk;

stigmatic disk green, occasionally reddened, 13-25 mm diam., entire to crenate;

stigmatic rays 9-23, linear to lanceolate, terminating 1-3 mm from margin of disk.
Seeds

3-6 mm.

Nuphar advena
Phenology Flowering mid spring–early fall, extended farther south.
Habitat Ponds, lakes, sluggish streams and rivers, springs, marshes, ditches, canals, sloughs, and tidal waters
Elevation 0-450 m (0-1500 ft)
Distribution
from FNA
AL; AR; CT; DC; DE; FL; GA; IL; IN; KS; KY; LA; MD; ME; MI; MO; MS; NC; NJ; NY; OH; OK; PA; SC; TN; TX; VA; VT; WI; WV; ON; Mexico (Coahuila, Tamaulipas); West Indies (Cuba)
[WildflowerSearch map]
[BONAP county map]
Discussion

Nuphar advena is extremely variable and intergrades with N. orbiculata, N. ulvacea, and N. sagittifolia in areas of sympatry. Intergradation with N. variegata (E. O. Beal 1956) can be observed in the mid-Atlantic region, although most floristic treatments from the area of overlap treat the two taxa as distinct species. Local variation in the Ozark Mountains and in Texas, the basis for the names Nymphaea ozarkana, N. ovata, and N. puberula, is not considered sufficient to warrant recognition.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 3.
Parent taxa Nymphaeaceae > Nuphar
Sibling taxa
N. microphylla, N. orbiculata, N. polysepala, N. rubrodisca, N. sagittifolia, N. ulvacea, N. variegata
Synonyms Nymphaea advena, N. fluviatilis, N. lutea subsp. advena, N. lutea subsp. macrophylla, N. lutea subsp. ozarkana, N. ozarkana, N. puteora, N. ×interfluitans, Nymphaea advena subsp. macrophylla, N. chartacea, Nymphaea fluviatilis, N. ludoviciana, N. macrophylla, N. microcarpa, N. ovata, N. ozarkana, N. puberula
Name authority (Aiton) W. T. Aiton: Hortus Kew. 3: 295. (1811)
Web links 
Unless otherwise noted, all data comes from the online version of the Flora of North America, who have made most of their content available via a Creative Commons license (CC BY 4.0).



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