Sagittaria cuneata

E. Sheldon

Bulletin of the Torrey Botanical Club 20:283, plate 159. 1893.

Common names: Northern arrowhead wapato Sagittaria cuneaire
IllustratedEndemic
Synonyms: Sagittaria arifolia Nuttall ex J. G. Smith
Treatment appears in FNA Volume 22.

Herbs, perennial, to 110 cm; rhizomes absent; stolons present; corms present. Leaves emersed, floating, and submersed; submersed phyllodial, flattened, to 45 cm; floating with petiole triangular, to 100 cm, blade cordate or sagittate, rarely linear or ovate, 7.5–9 × 3.5–4 cm; emersed with petiole recurved, 3.5–51 cm, blade linear to sagittate, 2.5–17 × 1.5–11 cm, basal lobes when present shorter than remainder of blade. Inflorescences racemes, rarely panicles, of 2–10 whorls, emersed, 14–21 × 2–10 cm, peduncle triangular, 10–50 cm; bracts connate more than or equal to ¼ total length, lance-attenuate or acute, mostly (4–) 7–40 mm, membranous, not papillose; fruiting pedicels ascending, cylindric, 0.5–2 cm. Flowers to 25 mm diam.; sepals recurved, not enclosing flower or fruiting head; filaments not dilated, equal to or longer than anthers, glabrous; pistillate pedicellate, without ring of sterile stamens. Fruiting heads 0.8–1.5 cm diam.; achenes obovoid, abaxially keeled, 1.8–2.6 × 1.3–2.5 mm, beaked; face not tuberculate, wings 0–1, entire, glands 0–1; beak apical, erect, 0.1–0.4 mm. 2n = 22.


Phenology: Flowering late spring–summer (Jun–Sep).
Habitat: Calcareous and muddy shores and shallow waters of rivers, lakes, ponds, pastures, and ditches, occasional in tidal waters, or in deep flowing water with slow current
Elevation: 100–2500 m

Distribution

V22 68-distribution-map.jpg

Alta., B.C., Man., N.B., Nfld. and Labr. (Labr.), N.W.T., N.S., Ont., Que., Sask., Yukon, Alaska, Ariz., Calif., Colo., Conn., Idaho, Ill., Ind., Iowa, Kans., Maine, Mass., Mich., Minn., Mont., Nebr., Nev., N.H., N.J., N.Mex., N.Y., N.Dak., Ohio, Okla., Oreg., Pa., S.Dak., Tex., Utah, Vt., Wash., Wis., Wyo.

Discussion

Sagittaria cuneata is extremely variable. On emersed plants, the leaf petioles are often bent toward the ground. Submersed plants often grow from a basal rosette with a long flexuous petiole and a floating sagittate leave. Plants in deep rivers often develop broad, straplike phyllodia.

Selected References

None.

Lower Taxa

None.
... more about "Sagittaria cuneata"
0.18 cm1.8 mm <br />0.0018 m <br /> (0.26 cm2.6 mm <br />0.0026 m <br />) +
keeled;obovoid +
1.3mm;2.5mm +
papillose +  and smooth +
Obtuse (?) +  and Acute (?) +
Robert R. Haynes +  and C. Barre Hellquist +
E. Sheldon +
attenuate;hastate or sagittate +
0.01 cm0.1 mm <br />1.0e-4 m <br /> (0.04 cm0.4 mm <br />4.0e-4 m <br />) +
2.5 cm25 mm <br />0.025 m <br /> (17 cm170 mm <br />0.17 m <br />) +
linear +  and sagittate +
1.5cm +  and 11cm +
0.4 cm4 mm <br />0.004 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
not papillose +
cylindric +, acute +  and lance-attenuate +
membranous +
equal to ¼ total length +  and more than +
Northern arrowhead +, wapato +  and Sagittaria cuneaire +
Alta. +, B.C. +, Man. +, N.B. +, Nfld. and Labr. (Labr.) +, N.W.T. +, N.S. +, Ont. +, Que. +, Sask. +, Yukon +, Alaska +, Ariz. +, Calif. +, Colo. +, Conn. +, Idaho +, Ill. +, Ind. +, Iowa +, Kans. +, Maine +, Mass. +, Mich. +, Minn. +, Mont. +, Nebr. +, Nev. +, N.H. +, N.J. +, N.Mex. +, N.Y. +, N.Dak. +, Ohio +, Okla. +, Oreg. +, Pa. +, S.Dak. +, Tex. +, Utah +, Vt. +, Wash. +, Wis. +  and Wyo. +
100–2500 m +
u--shaped +
not tuberculate +
0.8 cm8 mm <br />0.008 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
not dilated +
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 (?) +
Calcareous and muddy shores and shallow waters of rivers, lakes, ponds, pastures, and ditches, occasional in tidal waters, or in deep flowing water with slow current +
decumbent +  and floating +
14 cm140 mm <br />0.14 m <br /> (21 cm210 mm <br />0.21 m <br />) +
2 cm20 mm <br />0.02 m <br /> (10 cm100 mm <br />0.1 m <br />) +
petiolate +  and sessile +
flattened +
0 cm0 mm <br />0 m <br /> (45 cm450 mm <br />0.45 m <br />) +
decumbent +  and floating +
submersed +, floating +  and emersed +
ascending +  and recurved +
triangular +
10 cm100 mm <br />0.1 m <br /> (50 cm500 mm <br />0.5 m <br />) +
deciduous +
triangular +
3.5 cm35 mm <br />0.035 m <br /> (51 cm510 mm <br />0.51 m <br />) +
Flowering late spring–summer (Jun–Sep). +
not radiating +  and arranged +
Bulletin of the Torrey Botanical Club +
decumbent +  and floating +
persistent +
sculptured +
herbaceous;leathery +
Illustrated +  and Endemic +
Sagittaria arifolia +
Sagittaria cuneata +
Sagittaria +
species +
white;brown +
emersed +  and submersed +
glabrous +  and sparsely pubescent +
bracteolate +  and branching +