Northern Prairie Wildlife Research Center
Jointed Rush (Juncus nodosus)
- Family: Rush (Juncaceae)
- Flowering: July-August.
- Field Marks: Jointed rush has terete, hollow leaves and flowers borne in spherical heads up to 1/4 inch in diameter with the sepals about as long as the petals.
- Habitat: Sandy banks of rivers and streams.
- Habit: Perennial herb with rhizomes.
- Stems: Erect, smooth, unbranched, up to 2 feet tall.
- Leaves: Elongated, terete, hollow, the uppermost leaves overtopping the clusters of flowers.
- Flowers: Borne in spherical heads up to 1/4 inch in diameter, with up to 30 heads per stem.
- Sepals: 3, greenish brown, tapering to a slender point, up to 1/6\10 inch long.
- Petals: 3, greenish brown, tapering to a slender point, up to 1/6\10 inch long.
- Stamens: 6.
- Pistils: Ovary superior.
- Fruits: Capsules lanceoloid, tapering to a narrow point, longer than the sepals and petals.
Previous Species -- Inland Rush (Juncus interior)
Return to Species List -- Group 4
Next Species -- Slender Rush (Juncus tenuis)