Sagittaria ambigua

J. G. Smith

N. Amer. Sagittaria. 22, plate 17. 1894.

EndemicConservation concern
Treatment appears in FNA Volume 22.

Herbs, perennial, to 90 cm; rhizomes absent; stolons present; corms present. Leaves emersed; petiole triangular, 15–54 cm; blade lanceolate to ovate, 5–20 × 1–10.5 cm. Inflorescences racemes, rarely panicles, of 2–11 whorls, emersed; bracts scarcely connate proximally, linear to lanceolate, 10–30 mm, delicate, not papillose; fruiting pedicels spreading to ascending, cylindric, 1.5–3.5 cm. Flowers to 23 mm diam.; sepals recurved, not enclosing flower or fruiting head; filaments linear, shorter than anthers, glabrous; pistillate pedicellate, without ring of stamens. Fruiting heads 0.8–1.2 cm diam; achenes cuneate-obovoid, abaxially keeled, 1.5–2.1 × 0.8–1.5 mm, beaked; faces not tuberculate, wings 0–1, entire, glands absent; beak lateral, horizontal or incurved, 0.1–0.2 mm.


Phenology: Flowering spring–summer (Apr–Sep).
Habitat: Pond and lake shores, shallow water, ditches, and damp areas
Elevation: 100–1000 m

Distribution

V22 189-distribution-map.jpg

Ill., Ind., Kans., Mo., Okla.

Discussion

Of conservation concern.

Selected References

None.

Lower Taxa

None.
... more about "Sagittaria ambigua"
0.15 cm1.5 mm <br />0.0015 m <br /> (0.21 cm2.1 mm <br />0.0021 m <br />) +
keeled;cuneate-obovoid +
0.8mm;1.5mm +
papillose +  and smooth +
Obtuse (?) +  and Acute (?) +
Robert R. Haynes +  and C. Barre Hellquist +
J. G. Smith +
attenuate;hastate or sagittate +
incurved +  and horizontal +
0.01 cm0.1 mm <br />1.0e-4 m <br /> (0.02 cm0.2 mm <br />2.0e-4 m <br />) +
5 cm50 mm <br />0.05 m <br /> (20 cm200 mm <br />0.2 m <br />) +
lanceolate +  and ovate +
1cm +  and 10.5cm +
spreading;ascending +
not papillose +
cylindric +, linear +  and lanceolate +
Ill. +, Ind. +, Kans. +, Mo. +  and Okla. +
100–1000 m +
u--shaped +
not tuberculate +
0.8 cm8 mm <br />0.008 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
linear +  and dilated +
pistillate +, staminate +, sessile +  and pedicellate +
0 cm0 mm <br />0 m <br /> (2.3 cm23 mm <br />0.023 m <br />) +
hypogynous +
not +, keeled +  and compressed +
Pond and lake shores, shallow water, ditches, and damp areas +
decumbent +  and floating +
petiolate +  and sessile +
decumbent +  and floating +
submersed +, floating +  and emersed +
ascending +  and recurved +
deciduous +
triangular +
15 cm150 mm <br />0.15 m <br /> (54 cm540 mm <br />0.54 m <br />) +
Flowering spring–summer (Apr–Sep). +
not radiating +  and arranged +
N. Amer. Sagittaria. +
decumbent +  and floating +
persistent +
sculptured +
herbaceous;leathery +
Endemic +  and Conservation concern +
Lophotocarpus +
Sagittaria ambigua +
Sagittaria +
species +
white;brown +
emersed +  and submersed +
glabrous +  and sparsely pubescent +
bracteolate +  and branching +