Sagittaria filiformis

J. G. Smith

N. Amer. Sagittaria. 20, plate 15, figs. 5–8. 1894.

Endemic
Synonyms: Sagittaria stagnorum Small Sagittaria subulata var. gracillima (S. Watson) J. G. Smith
Treatment appears in FNA Volume 22.
Revision as of 23:57, 29 July 2020 by imported>Volume Importer
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Herbs, perennial, to 170 cm, mostly of fresh waters, some plants stranded along shore; rhizomes absent; stolons present; corms present. Leaves submersed or floating, rarely emersed; submersed phyllodial, flattened, 30–250 × 0.1–1.5 cm; floating with petiole flattened, to 40 cm, blade linear-ovate to ovate, rarely sagittate, to 3.5 × 0.5 cm; emersed with petiole 5–10 cm, blade linear-ovate to ovate, rarely hastate to sagittate, to 4 × 0.5 cm; stranded plants usually with expanded leaf-blades. Inflorescences racemes, rarely panicles, of 4–10 whorls, floating to slightly emersed, 15–25 × 5–15 cm; peduncles 10–200 cm; bracts connate more than ¼ total length, lanceolate, 110 mm, delicate, not papillose; fruiting pedicels spreading to recurved, cylindric, 1.5–4.5 cm. Flowers to 3 cm diam.; sepals spreading in staminate, erect in pistillate, enclosing flower or fruiting head; filaments dilated, equaling anthers, glabrous; pistillate pedicellate, without ring of sterile stamens. Fruiting heads 0.7–1 cm diam.; achenes obovoid, abaxially keeled, 5 × 2.5 mm, beaked; faces not tuberculate, wings 0–3, entire, glands 0–1; beak lateral, erect, 1 mm. 2n = 22.


Phenology: Flowering summer–fall.
Habitat: Shallow, swift waters or deep streams in northern portion of range, ponds, lakes, drainage canals, and swamps in southern portion of range
Elevation: 0–100 m

Distribution

V22 443-distribution-map.jpg

Ala., Conn., Fla., Ga., Maine, Mass., N.J., N.Y., N.C., Pa., R.I., S.C., Va.

Discussion

Selected References

None.

Lower Taxa

None.
... more about "Sagittaria filiformis"
5 cm50 mm <br />0.05 m <br /> (?) +
keeled;obovoid +
papillose +  and smooth +
obtuse +  and acute +
Robert R. Haynes +  and C. Barre Hellquist +
J. G. Smith +
attenuate;hastate or sagittate +
1 cm10 mm <br />0.01 m <br /> (?) +
0 cm0 mm <br />0 m <br /> (4 cm40 mm <br />0.04 m <br />) +
linear-ovate +  and ovate rarely hastate +
0 cm0 mm <br />0 m <br /> (?) +  and 0.5 cm5 mm <br />0.005 m <br /> (?) +
more than ¼ total length +
spreading;recurved +
not papillose +
cylindric +  and lanceolate +
1.5 cm15 mm <br />0.015 m <br /> (4.5 cm45 mm <br />0.045 m <br />) +
Ala. +, Conn. +, Fla. +, Ga. +, Maine +, Mass. +, N.J. +, N.Y. +, N.C. +, Pa. +, R.I. +, S.C. +  and Va. +
0–100 m +
u--shaped +
not tuberculate +
glabrous +  and pubescent +
pistillate +, staminate +, sessile +  and pedicellate +
0 cm0 mm <br />0 m <br /> (3 cm30 mm <br />0.03 m <br />) +
hypogynous +
not +, keeled +  and compressed +
0 +  and 1 +
Shallow, swift waters or deep streams in northern portion of range, ponds, lakes, drainage canals, and swamps in southern portion of range +
decumbent +  and floating +
15 cm150 mm <br />0.15 m <br /> (25 cm250 mm <br />0.25 m <br />) +
floating +  and slightly emersed +
5 cm50 mm <br />0.05 m <br /> (15 cm150 mm <br />0.15 m <br />) +
petiolate +  and sessile +
30 cm300 mm <br />0.3 m <br /> (250 cm2,500 mm <br />2.5 m <br />) +
submersed +, emersed +  and floating +
flattened +
0.1 cm1 mm <br />0.001 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
decumbent +  and floating +
submersed +, floating +  and emersed +
ascending +  and recurved +
10 cm100 mm <br />0.1 m <br /> (200 cm2,000 mm <br />2 m <br />) +
deciduous +
flattened +
5 cm50 mm <br />0.05 m <br /> (10 cm100 mm <br />0.1 m <br />) +
Flowering summer–fall. +
not radiating +  and arranged +
N. Amer. Sagittaria. +
decumbent +  and floating +
persistent +
erect;spreading +
sculptured +
herbaceous;leathery +
Sagittaria stagnorum +  and Sagittaria subulata var. gracillima +
Sagittaria filiformis +
Sagittaria +
species +
white;brown +
plant +  and herb +
emersed +  and submersed +
glabrous +  and sparsely pubescent +
bracteolate +  and branching +