Page authors: Don Knoke, David Giblin
Heteranthera dubia
grassleaf mud-plantain, water stargrass
WTU specimens
Other herbaria
WTU images

Distribution: In scattered localities in Washington, however locally common and abundant in lower Yakima River; British Columbia south to California, widespread in eastern North America.

Habitat: Quiet streams, ponds and lakes.

Flowers: July-September

Origin: Native

Conservation Status: Not of concern

Description:
General:

Submersed to partially floating perennial with freely-rooting, weak stems.

Leaves:

Leaves alternate, stipulate, linear, 7-15 cm. long and 2-5 mm. broad.

Flowers:

Flowers solitary, pale yellow, subtended by a bract, at the water surface; perianth tube very slender, 2-4 cm. long, the 6 lobes alike, linear, 5-mm. long; stamens 3; style 1, with 3 entire stigmas; ovary superior, 1-celled, with 3 parietal placentae.

Fruits:

Capsule many-seeded.

Accepted Name:
Heteranthera dubia (Jacq.) MacMill.
Publication: Metasp. Minnesota Valley. 138. 1892. 1892.

Synonyms & Misapplications:
Zosterella dubia (Jacq.) Small [ILBC7]
Additional Resources:

PNW Herbaria: Specimen records of Heteranthera dubia in the Consortium of Pacific Northwest Herbaria database.

WA Flora Checklist: Heteranthera dubia checklist entry.

E-Flora BC: Heteranthera dubia atlas page.

CalPhotos: Heteranthera dubia photos.

USDA Plants: Heteranthera dubia information.

13 photographs:
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