Comments
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Sagittaria latifolia has been divided into numerous species and varieties. It was divided into two varieties, based upon the presence of pubescence over the entire vegetative plant (C. Bogin 1955; K. Rataj 1972). We have examined numerous specimens and found that many from the southeastern United States are pubescent; we believe that this character alone is insufficient for recognition of the varieties.
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- Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA
Description
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Herbs, perennial, to 45 cm; rhizomes absent; stolons present; corms present. Leaves emersed; petiole triangular, erect to ascending, 6.5--51 cm; blade sagittate, rarely hastate, 1.5--30.5 ´ 2--17 cm, basal lobes equal to or less than remainder of blade. Inflorescences racemes, rarely panicles, of 3--9 whorls, emersed, 4.5--28.5 ´ 4--23 cm; peduncles 10--59 cm; bracts connate more than or equal to ¼ total length, elliptic to lanceolate, 3--8 mm, delicate, not papillose; fruiting pedicels spreading, cylindric, 0.5--3.5 cm. Flowers to 4 cm diam.; sepals recurved to spreading, not enclosing flower or fruiting head; filaments cylindric, longer than anthers, glabrous; pistillate pedicellate, without ring of sterile stamens. Fruiting heads 1--1.7 cm diam; achenes oblanceoloid, without abaxial keel, 2.5--3.5 ´ to 2 mm, beaked; faces not tuberculate, wings absent, glands (0--)1(--2); beak lateral, horizontal, 1--2 mm. 2n = 22.
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- Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA
Distribution
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Alta., B.C., Man., N.B., N.S., Ont., P.E.I., Que., Sask.; Ala., Ark., Calif., Colo., Conn., Del., D.C., Fla., 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.; c, s Mexico; Central America (Guatemala); South America (Colombia, Ecuador, Venezuela).
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- Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA
Habitat
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Wet ditches, pools, and margins of streams and lakes; 0--1500m.
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- Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA
Synonym
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Sagittaria latifolia var. obtusa (Muhlenberg) Wiegand; S. latifolia var. pubescens (Engelmann) J. G. Smith; S. ornithorhyncha Small; S. planipes Fernald; S. pubescens Muhlenberg; S. viscosa C. Mohr
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- Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA