Sagittaria secundifolia

Kral

Brittonia 34: 12, fig.1. 1982.

EndemicConservation concern
Treatment appears in FNA Volume 22.

Herbs, perennial, to 50 cm; rhizomes coarse; stolons absent; corms absent. Leaves mostly submersed, rarely emersed, sessile, phyllodial, flattened to lenticular, 5–30 × 0.2–0.5 cm. Inflorescences racemes, of 2–5 whorls, emersed, 1.5–8 × 1–7 cm; peduncles 1–2.5 cm; bracts connate more than or equal to ¼ total length, lanceolate, 0.5–1.5 mm, delicate, not papillose; fruiting pedicels spreading, cylindric, 0.6–2.5 cm. Flowers to 2.5 cm diam.; sepals recurved to spreading, not enclosing flower or fruiting head; filaments dilated, shorter than anthers, minutely tomentose; pistillate pedicellate, without ring of sterile stamens. Fruiting heads 0.5 cm diam; achenes obovoid-triangular, abaxially keeled, 2 × 1 mm, beaked; faces tuberculate, wings 1, scalloped or toothed, glands 0–1; beak lateral, incurved-erect, 0.3 mm.


Phenology: Flowering spring–fall.
Habitat: Riverine shoals and pools
Elevation: 300–400 m

Discussion

The rhizomes of Sagittaria secundifolia grow in crevices of bedrock along the Little River in Alabama. During lower water periods, the plant flowers, with peduncles reaching the water surface, and flowers more or less floating on the water.

Of conservation concern.

Selected References

None.

Lower Taxa

None.
... more about "Sagittaria secundifolia"
2 cm20 mm <br />0.02 m <br /> (?) +
keeled;obovoid-triangular +
papillose +  and smooth +
Obtuse (?) +  and Acute (?) +
Robert R. Haynes +  and C. Barre Hellquist +
attenuate;hastate or sagittate +
incurved-erect +
0.3 cm3 mm <br />0.003 m <br /> (?) +
linear +  and obovate +
not papillose +
cylindric +  and lanceolate +
equal to ¼ total length +  and more than +
300–400 m +
u--shaped +
tuberculate +
0.5 cm5 mm <br />0.005 m <br /> (?) +
pistillate +, staminate +, sessile +  and pedicellate +
0 cm0 mm <br />0 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
hypogynous +
not +, keeled +  and compressed +
0 (?) +  and 1 (?) +
Riverine shoals and pools +
decumbent +  and floating +
1.5 cm15 mm <br />0.015 m <br /> (8 cm80 mm <br />0.08 m <br />) +
1 cm10 mm <br />0.01 m <br /> (7 cm70 mm <br />0.07 m <br />) +
5cm;30cm +
flattened;lenticular +
0.2 cm2 mm <br />0.002 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
decumbent +  and floating +
submersed +, floating +  and emersed +
ascending +  and recurved +
1 cm10 mm <br />0.01 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
deciduous +
terete +  and triangular +
Flowering spring–fall. +
not radiating +  and arranged +
decumbent +  and floating +
persistent +
recurved;spreading +
sculptured +
herbaceous;leathery +
Endemic +  and Conservation concern +
Lophotocarpus +
Sagittaria secundifolia +
Sagittaria +
species +
white;brown +
emersed +  and submersed +
glabrous +  and sparsely pubescent +
bracteolate +  and branching +
toothed +  and scalloped +