Distribution: Occurring chiefly east of the Cascades crest in Washington; Alaska to California (not in Oregon), east across most of North America to the Atlantic Coast.
Habitat: Shores, wet meadows, springs, and ditches.
Flowers: June-August
Origin: Native
Growth Duration: Perennial
Conservation Status: Not of concern
Pollination: Wind
Perennial from slender rhizomes, the stems 1.5-4 dm. tall, arising singly from swollen nodes.
Leaves alternate, 1-3, the blades semi-terete, with prominent partitions; leaf bases sheathing, the sheaths projecting into rounded auricles 1 mm. long.
Inflorescence terminal, up to 5 cm. long, exceeded by the upper leaf and the involucral bract; heads 3-15, many-flowered, up to 1 cm. long; perianth about 3.5 mm. long, greenish-brown to tawny, the 6 segments narrowly lanceolate, acuminate and somewhat awl-shaped, subequal; stamens 6.
Capsule conic, tapered almost from the base to a long beak that much exceeds the perianth.
Publication: Sp. Pl., ed. 2. 1: 466. 1762.
Juncus nodosus L. var. nodosus [KZ99]
Juncus rostkovii E. Mey.
PNW Herbaria: Specimen records of Juncus nodosus in the Consortium of Pacific Northwest Herbaria database
WA Flora Checklist: Juncus nodosus checklist entry
OregonFlora: Juncus nodosus information
E-Flora BC: Juncus nodosus atlas page
CalPhotos: Juncus nodosus photos
