Nuphar ulvacea

(G. S. Miller & Standley) Standley

Publ. Field Columbian Mus., Bot. Ser. 8: 311. 1931 (as ulvaceum).

Conservation concernEndemic
Basionym: Nymphaea ulvacea G. S. Miller & Standley Contr. U.S. Natl. Herb. 16: 97. 1912
Synonyms: Nuphar lutea subsp. ulvacea (G. S. Miller and Standley) E. O. Beal
Treatment appears in FNA Volume 3.

Rhizomes 2-5 cm diam. Leaves floating or submersed; petiole terete. Leaf-blade abaxially and adaxially green, lanceolate to ovate, 15-25 × 8-10 cm, ca. 2.5 times as long as wide, sinus less than 1/3 length of midrib, lobes often overlapping; surfaces glabrous. Flowers 2-3 cm diam.; sepals 6-9, abaxially green to adaxially yellow toward base; petals oblong, thick; anthers 2-5 mm, slightly longer than filaments. Fruit green, nearly globose, 1.5-2.5 × 1.5-2.5 cm, strongly ribbed, slightly constricted below stigmatic disk; stigmatic disk green, 11-18 mm diam., undulate; stigmatic rays 9-16, ± elliptic, terminating within 1 mm from margin of disk. Seeds 3.5-4 mm.


Phenology: Flowering spring–early fall.
Habitat: Blackwater rivers and streams
Elevation: 0-100 m

Discussion

Of conservation concern.

Nuphar ulvacea is probably better treated as a subspecies. Gulf coast plants intermediate between N. ulvacea and N. advena, which have been treated as Nymphaea [Nuphar] chartacea, are treated under N. advena.

Selected References

None.

Lower Taxa

None.

"thick" is not a number.

... more about "Nuphar ulvacea"
slightly longer +
0.2 cm2 mm <br />0.002 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
John. H. Wiersema +  and C. Barre Hellquist +
(G. S. Miller & Standley) Standley +
divergent;overlapping +
Nymphaea ulvacea +
0-100 m +
2 cm20 mm <br />0.02 m <br /> (3 cm30 mm <br />0.03 m <br />) +
nocturnal +  and diurnal +
held above surface +  and floating +
protogynous +  and bisexual +
dehiscent +  and indehiscent +
1.5 cm15 mm <br />0.015 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
globose +
constricted +
1.5 cm15 mm <br />0.015 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
Blackwater rivers and streams +
extra-axillary +  and axillary +
15 cm150 mm <br />0.15 m <br /> (25 cm250 mm <br />0.25 m <br />) +
lanceolate;ovate +
8cm +  and 10cm +
submersed +  and floating +
overlapping +
entire +  and crenate or dentate +
not spreading +
transitional +
inconspicuous +
Flowering spring–early fall. +
3-35-carpellate +
Publ. Field Columbian Mus., Bot. Ser. +
2 cm20 mm <br />0.02 m <br /> (5 cm50 mm <br />0.05 m <br />) +
tuberous-thickened +
adventitious +
several;numerous +
0.35 cm3.5 mm <br />0.0035 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
abaxially green +  and adaxially yellow +
distinct +
orbiculate;obovate;oblong +
Conservation concern +  and Endemic +
red-tinged +  and yellow +
1.1 cm11 mm <br />0.011 m <br /> (1.8 cm18 mm <br />0.018 m <br />) +
Nuphar lutea subsp. ulvacea +
Nuphar ulvacea +
species +