Page authors: Don Knoke, David Giblin
Juncus gerardi
black rush, mud rush
WTU specimens
Other herbaria

Distribution: Occurring west of the Cascades crest in counties along the Puget Sound and outer coast; British Columbia south to Oregon, east sporadically across the U.S. to the northern Atlantic coast of the U.S. and Canada; circumboreal.

Habitat: Coastal salt marshes.

Flowers: June-September

Origin: Both native and introduced - occurring in eastern North America, Eurasia.

Conservation Status: Not of concern

Description:
General:

Rhizomatous perennial 3-7 dm. tall.

Leaves:

Leaves alternate, the blades flat, 1.5-3 mm. broad; leaf bases sheathing, the sheaths several, the uppermost extending to above midlength of the flowering stem.

Flowers:

Inflorescence many-flowered, loosely cymose, 3-10 cm. long; perianth 3-4 mm. long, the 6 segments dark brown with a greenish mid-stripe, blunt, and hooded at the tip; stamens 6, the anthers much longer than the filaments.

Fruit:

Capsule ovoid to obovoid, rounded, about equal to the perianth.

Accepted Name:
Juncus gerardi Loisel.

Synonyms & Misapplications:
Juncus bulbosus L. var. gerardii (Loisel.) A. Gray
Juncus gerardii Loisel., orthographic variant [FNA22, HC]
Infraspecies:
ssp. gerardi – black rush, mud rush    Occurring west of the Cascades crest in counties along the Puget Sound and outer coast; British Columbia south to Oregon, east sporadically across the U.S. to the northern Atlantic coast of the U.S. and Canada; circumboreal.
Additional Resources:

PNW Herbaria: Specimen records of Juncus gerardi in the Consortium of Pacific Northwest Herbaria database.

WA Flora Checklist: Juncus gerardi checklist entry.

E-Flora BC: Juncus gerardi atlas page.

CalPhotos: Juncus gerardi photos.

USDA Plants: Juncus gerardi information.

2 photographs:
Group by