Sagittaria montevidensis

Chamisso & Schlechtendal

Linnaea 2: 156. 1827.

Common names: Sagittaire spongieuse
WeedyIllustrated
Treatment appears in FNA Volume 22.

Herbs, annual or perennial, to 100 cm; rhizomes present; stolons present; corms present. Leaves submersed and emersed; submersed leaves absent or phyllodial, flattened, to 17 × 2 cm; emersed leaves with petiole triangular, 21–55 cm, blade hastate to sagittate, 2.5–17.5 × 0.6–22 cm, lobes longer than or equal to remainder of blade. Inflorescences racemes or panicles, of 1–15 whorls, floating or emersed, 1.5–28 × 1.5–15 cm; peduncles 15–47 cm; bracts distinct or connate less than ¼ total length, lanceolate to elliptic, 4–34 mm, delicate, not papillose; fruiting pedicels recurved, club-shaped, 0.5–4.2 cm. Flowers 2–5 cm diam.; sepals spreading in staminate, erect in pistillate, enclosing flower or fruiting head; filaments cylindric, longer than anthers, glabrous; pistillate pedicellate, with or without ring of sterile stamens. Fruiting heads 1.2–2.1 cm diam.; achenes oblanceoloid, not abaxially keeled, 2–4.3 × 0.7–1.5 mm, beaked; faces not tuberculate, wings absent, glands 1; beak lateral, horizontal, 0.4–0.8 mm.

Distribution

V22 347-distribution-map.jpg

N.B., Ala., Ark., Calif., Colo., Conn., Del., Fla., Ga., Ill., Ind., Iowa, Kans., Ky., La., Maine, Mass., Md., Mich., Minn., Miss., Mo., N.C., N.H., N.J., N.Mex., N.Y., Nebr., Ohio, Okla., Pa., S.C., S.Dak., Tenn., Tex., Va., W.Va., Wis., Mexico, South America

Discussion

Subspecies 3 (3 in the flora).

Selected References

None.

Key

1 Plants of tidal mud flats, often stranded by low tide, emersed blades spatulate, rarely sagittate. Sagittaria montevidensis subsp. spongiosa
1 Plants of fresh waters, not stranded by low tide; emersed blades hastate to sagittate. > 2
2 Pistillate flowers without ring of sterile stamens; petals with purple spot at base Sagittaria montevidensis subsp. montevidensis
2 Pistillate flowers with ring of sterile stamens; petals without purple spot at base. Sagittaria montevidensis subsp. calycina
... more about "Sagittaria montevidensis"
0.2 cm2 mm <br />0.002 m <br /> (0.43 cm4.3 mm <br />0.0043 m <br />) +
keeled;oblanceoloid +
0.7mm;1.5mm +
papillose +  and smooth +
Obtuse (?) +  and Acute (?) +
Robert R. Haynes +  and C. Barre Hellquist +
Chamisso & Schlechtendal +
attenuate;hastate or sagittate +
0.04 cm0.4 mm <br />4.0e-4 m <br /> (0.08 cm0.8 mm <br />8.0e-4 m <br />) +
2.5 cm25 mm <br />0.025 m <br /> (17.5 cm175 mm <br />0.175 m <br />) +
hastate +  and sagittate +
0.6cm +  and 22cm +
less than ¼ total length +
connate +  and distinct +
not papillose +
club--shaped +, lanceolate +  and elliptic +
Sagittaire spongieuse +
N.B. +, Ala. +, Ark. +, Calif. +, Colo. +, Conn. +, Del. +, Fla. +, Ga. +, Ill. +, Ind. +, Iowa +, Kans. +, Ky. +, La. +, Maine +, Mass. +, Md. +, Mich. +, Minn. +, Miss. +, Mo. +, N.C. +, N.H. +, N.J. +, N.Mex. +, N.Y. +, Nebr. +, Ohio +, Okla. +, Pa. +, S.C. +, S.Dak. +, Tenn. +, Tex. +, Va. +, W.Va. +, Wis. +, Mexico +  and South America +
u--shaped +
not tuberculate +
1.2 cm12 mm <br />0.012 m <br /> (2.1 cm21 mm <br />0.021 m <br />) +
cylindric +
pistillate +, staminate +, sessile +  and pedicellate +
2 cm20 mm <br />0.02 m <br /> (5 cm50 mm <br />0.05 m <br />) +
hypogynous +
not +, keeled +  and compressed +
decumbent +  and floating +
emersed +  and floating +
petiolate +  and sessile +
0cm;17cm +
flattened +
21 cm210 mm <br />0.21 m <br /> (55 cm550 mm <br />0.55 m <br />) +
0 cm0 mm <br />0 m <br /> (2 cm20 mm <br />0.02 m <br />) +
decumbent +  and floating +
1.5cm;28cm +
emersed +  and floating +
1.5 cm15 mm <br />0.015 m <br /> (15 cm150 mm <br />0.15 m <br />) +
ascending +  and recurved +
15 cm150 mm <br />0.15 m <br /> (47 cm470 mm <br />0.47 m <br />) +
deciduous +
triangular +
not radiating +  and arranged +
decumbent +  and floating +
1.5cm;28cm +
emersed +  and floating +
1.5cm;15cm +
pedicellate +
persistent +
erect;spreading +
sculptured +
herbaceous;leathery +
Weedy +  and Illustrated +
Lophotocarpus +
Sagittaria montevidensis +
Sagittaria +
species +
white;brown +
perennial +  and annual +
emersed +  and submersed +
glabrous +  and sparsely pubescent +
bracteolate +  and branching +