Sagittaria montevidensis subsp. spongiosa

(Engelmann) Bogin

Memoirs of the New York Botanical Garden 9: 198. 1955.

Common names: Tidal arrowhead
Endemic
Basionym: Sagittaria calycina var. spongiosa Engelmann in A. Gray, Manual ed. 5, 493. 1867
Synonyms: Lophotocarpus spongiosus (J. G. Smith) Buchenau Sagittaria spatulata
Treatment appears in FNA Volume 22.

Herbs, annual, often stranded by low tide. Leaves emersed, sessile, phyllodial, lanceolate, or petiolate with blade spatulate, rarely sagittate. Inflorescences of 1–4 whorls, emersed; bracts connate. Flowers: pistillate with ring of sterile stamens; petals without purple spot at base. 2n = 22.


Phenology: Flowering summer–fall (Jul–Oct).
Habitat: Brackish to freshwater tidal mud flats and salt marshes
Elevation: 0–5 m

Distribution

V22 342-distribution-map.jpg

N.B., Conn., Del., Maine, Md., Mass., N.H., N.J., N.Y., Pa.

Discussion

Selected References

None.

Lower Taxa

None.
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 +
(Engelmann) Bogin +
attenuate;hastate or sagittate +
Sagittaria calycina var. spongiosa +
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 />) +
spatulate +
0.6cm +  and 22cm +
less than ¼ total length +
not papillose +
club--shaped +, lanceolate +  and elliptic +
Tidal arrowhead +
N.B. +, Conn. +, Del. +, Maine +, Md. +, Mass. +, N.H. +, N.J. +, N.Y. +  and Pa. +
0–5 m +
u--shaped +
not tuberculate +
1.2 cm12 mm <br />0.012 m <br /> (2.1 cm21 mm <br />0.021 m <br />) +
cylindric +
2 cm20 mm <br />0.02 m <br /> (5 cm50 mm <br />0.05 m <br />) +
hypogynous +
not +, keeled +  and compressed +
Brackish to freshwater tidal mud flats and salt marshes +
decumbent +  and floating +
petiolate +  and sessile +
0cm;17cm +
sagittate;lanceolate +
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 +
Flowering summer–fall (Jul–Oct). +
not radiating +  and arranged +
Memoirs of the New York Botanical Garden +
decumbent +  and floating +
1.5cm;28cm +
emersed +  and floating +
1.5cm;15cm +
pedicellate +
persistent +
erect;spreading +
sculptured +
herbaceous;leathery +
Lophotocarpus spongiosus +  and Sagittaria spatulata +
Sagittaria montevidensis subsp. spongiosa +
Sagittaria montevidensis +
subspecies +
white;brown +
emersed +  and submersed +
glabrous +  and sparsely pubescent +
bracteolate +  and branching +