Page author: Don Knoke
Schoenoplectus subterminalis
swaying clubrush, water clubrush
WTU specimens
Other herbaria

Distribution: Chiefly west of the Cascades, southern Alaska to southern Oregon; also in northern Idaho, northwest Montana, and eastern United States.

Habitat: Quiet, shallow water 2-8 dm. deep,

Flowers: July - August

Origin: Native

Conservation Status: Not of concern

Description:
General:

Aquatic perennials from rhizomes, the slender, weak, sub-terete stems 20-80 cm. long.

Leaves:

Leaves elongate, weak, from near the base, the upper portion usually floating, or the plant occasionally terrestrial with erect stem and leaves.

Flowers:

Inflorescence a solitary, light brown spikelet 7-12 mm. long, subtended by a bract 1.5-6 cm. long that looks like a continuation of the stem; flowers subtended by thin translucent scales 4-6 mm. long; perianth of 2-6 bristles about equal to the achene; stamens 3; style trifid.

Fruits:

Achenes triangular, 2.5-3.8 mm. long, including the slender beak.

Accepted Name:
Schoenoplectus subterminalis (Torr.) Soják
Publication: Cas. Nár. Mus., Odd. Prír. 140: 127. 1972. 1972.

Synonyms & Misapplications:
Scirpus subterminalis Torr. [HC]
Additional Resources:

PNW Herbaria: Specimen records of Schoenoplectus subterminalis in the Consortium of Pacific Northwest Herbaria database.

WA Flora Checklist: Schoenoplectus subterminalis checklist entry.

E-Flora BC: Schoenoplectus subterminalis atlas page.

CalPhotos: Schoenoplectus subterminalis photos.

USDA Plants: Schoenoplectus subterminalis information.

24 photographs:
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