Northern Prairie Wildlife Research Center
Western Wetland Flora
Field Office Guide to Plant Species
Juncus castaneus J. E. Smith
- Family: Rush (Juncaceae)
- Flowering: July-August
- Field Marks: This alpine rush differs by its slender rhizomes, slender and pointed capsules longer than the sepals, and its seeds that have a tail longer than the rest of the seed.
- Habitat: Along streams, around and in ponds, fens, usually at or near timberline.
- Habit: Perennial herb with slender rhizomes.
- Stems: Upright, smooth, up to 18 inches long.
- Leaves: Alternate, elongate, hollow, septate, rounded into a tube or folded, up to 1/10 inch wide.
- Flowers: Several crowded into 1-4 heads, each head surpassed by a subtending bract;
flowers up to 15 per head.
- Sepals: 3, purple-brown, narrowly lanceolate, pointed at the tip, up to 1/3 inch long.
- Petals: 3, purple-brown, narrowly lanceolate, pointed at the tip, up to 1/3 inch long.
- Stamens: 6.
- Pistils: Ovary superior.
- Fruits: Capsules lanceoloid, narrow, pointed at the tip, up to nearly 1/2 inch long, longer than the sepals and petals; seeds very narrow, with a tail longer than the body of the seed.
- Notes: The seeds are eaten by small birds and small mammals.
Previous Species -- Two-flower Rush (Juncus biglumis)
Return to Species List -- Group 4
Next Species -- Colorado Rush (Juncus confuses)