Alisma subcordatum

Rafinesque

Medical Repository hexade 2, 5:354. 1808.

Common names: Southern water-plantain alisma subcorde
Illustrated
Synonyms: Alisma parviflorum Pursh Alisma plantago-aquatica var. parviflorum (Pursh) Torrey
Treatment appears in FNA Volume 22.

Herbs, to 6 dm. Leaves emersed, rarely floating, petiolate; blade ovate to elliptic, to 15 × 10 cm. Inflorescences to 1 m. Flowers chasmogamous; sepals 1.5–2.5 (–6) mm; petals white, 1–3 mm, margins slightly erose, apex mostly acuminate; anthers rounded, 0.4–0.6 mm; style curved, 0.2–0.4 mm, ¼ length ovary. Fruiting heads 2–4 mm diam; achenes obliquely ovoid, 1.5–2.2 mm, abaxially rounded, with 1 abaxial groove; beak ascending. 2n =14.


Phenology: Flowering spring–fall.
Habitat: Shallow ponds, stream margins, marshes, and ditches
Elevation: 50–1500 m

Distribution

V22 317-distribution-map.jpg

N.B., Ont., Que., Ala., Ark., Colo., Conn., Del., D.C., Ga., Ill., Ind., Iowa, Kans., Ky., La., Maine, Md., Mass., Mich., Minn., Miss., Mo., Nebr., N.H., N.J., N.Y., N.C., N.Dak., Ohio, Okla., Pa., R.I., S.C., S.Dak., Tenn., Tex., Vt., Va., W.Va., Wis., Mexico

Discussion

Selected References

None.

Lower Taxa

None.

... more about "Alisma subcordatum"
rounded;ovoid +
0.04 cm0.4 mm <br />4.0e-4 m <br /> (0.06 cm0.6 mm <br />6.0e-4 m <br />) +
Robert R. Haynes +  and C. Barre Hellquist +
Rafinesque +
attenuate;rounded +
0 cm0 mm <br />0 m <br /> (15 cm150 mm <br />0.15 m <br />) +
ovate +  and elliptic +
0cm +  and 10cm +
lanceolate +
Southern water-plantain +  and alisma subcorde +
N.B. +, Ont. +, Que. +, Ala. +, Ark. +, Colo. +, Conn. +, Del. +, D.C. +, Ga. +, Ill. +, Ind. +, Iowa +, Kans. +, Ky. +, La. +, Maine +, Md. +, Mass. +, Mich. +, Minn. +, Miss. +, Mo. +, Nebr. +, N.H. +, N.J. +, N.Y. +, N.C. +, N.Dak. +, Ohio +, Okla. +, Pa. +, R.I. +, S.C. +, S.Dak. +, Tenn. +, Tex. +, Vt. +, Va. +, W.Va. +, Wis. +  and Mexico +
50–1500 m +
u--shaped +
subsessile +  and long-pedicellate +
hypogynous +
compressed +
Shallow ponds, stream margins, marshes, and ditches +
decumbent +  and floating +
0 cm0 mm <br />0 m <br /> (100 cm1,000 mm <br />1 m <br />) +
submersed +  and emersed +
decumbent +  and floating +
deciduous +
0.1 cm1 mm <br />0.001 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
triangular +
Flowering spring–fall. +
not radiating +
Medical Repository +
decumbent +  and floating +
not septate +
0.25 cm2.5 mm <br />0.0025 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
persistent +
not sculptured +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
Illustrated +
0.2 cm2 mm <br />0.002 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
0.02 cm0.2 mm <br />2.0e-4 m <br /> (0.04 cm0.4 mm <br />4.0e-4 m <br />) +
Alisma parviflorum +  and Alisma plantago-aquatica var. parviflorum +
Alisma subcordatum +
species +
emersed +  and submersed +
bracteolate +  and branching +