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.

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 +
0cm +  and 0.5cm +
more than ¼ total length +
spreading;recurved +
not papillose +
cylindric +  and lanceolate +
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 +
30cm;250cm +
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 +