Vascular Plants of North Carolina
Account for Creeping Burhead - Echinodorus cordifolius   (L.) Grisebach
Members of Alismataceae:
Only member of Echinodorus in NC.
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Section 5 » Order Alismatales » Family Alismataceae
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Author(L.) Grisebach
DistributionScattered over nearly all of the Coastal Plain, barely west to the eastern Piedmont. Ranges west only to Durham, Chatham, and Anson counties.

This is a Southern species, occurring north mostly just to southern VA and IA, and south to central FL and southern TX. It is absent from the Mountains and most of the Piedmont province. It is numerous in counties close to the Mississippi River, north to IL, a portion of the Coastal Plain termed the Mississippi Embayment.
AbundanceUncommon in the Coastal Plain, and rare to locally very uncommon in the eastern Piedmont. Seems to be rare in coastal counties and not recorded from the Outer Banks.
HabitatThis is another marsh species, being found in very muddy ground or very shallow water, such as along pond margins, river oxbows and meanders, muddy places in marshes, and openings in swamps and wet bottomlands. Weakley (2018) mentions that it has a preference for higher pH soils, which may account for its general scarcity in the state despite occurring in widespread marshy habitats.
PhenologyBlooms from June into November, and fruits shortly after flowering.
IdentificationThis is another marsh-dwelling monocot with large leaf blades. The several leaves have stalks up to 1 foot long, topped by a somewhat widely ovate blade that is about 5-6 inches long and across, often with a squared-off base. The upper surface of the blade has conspicuous and deep curved veins. This species is odd in that the flowering stem is often 2 feet or longer, often drooping to the ground and rooting at nodes, producing a "creeping plant". At a handful of nodes along this stem grow several clusters of flowers, each 3-petaled and white in color, about 3/4-inch across. As with Alisma subcordatum, this is another marsh species with large leaves and an odd inflorescence, though in this species the inflorescence is long and slender with whorls of moderate-sized flowers. Despite it occurring in common marsh or mud habitats, it is barely encountered once a year by many biologists, but once seen it is not easily forgotten.
Taxonomic CommentsNone

Other Common Name(s)Spade-leaf Sword. The "bur" part of the common name is sometimes written as "burr".
State RankS3
Global RankG5
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