Northern Prairie Wildlife Research Center
Western Wetland Flora
Field Office Guide to Plant Species
Juncus triglumis L.
- Family: Rush (Juncaceae)
- Flowering: July-August
- Field Marks: This densely tufted perennial rush differs from all other rushes by its solitary head of flowers subtended by an awn-tipped bract shorter than or barely as long as the head.
- Habitat: Fens, open wet areas, at or near timberline in the mountains.
- Habit: Densely tufted perennial with fibrous roots.
- Stems: Upright, very slender, up to 8 inches tall, smooth.
- Leaves: Several crowded at the base of the plant, rolled up into a very slender hollow tube, about 1/36 inch wide, smooth but septate.
- Flowers: 2-several crowded into a solitary head, the head subtended by an awn-tipped bract shorter than or barely longer than the head.
- Sepals: 3, whitish or brown, lanceolate, pointed at the tip, up to 1/4 inch long.
- Petals: 3, whitish or brown, lanceolate, pointed at the tip, slightly shorter than the sepals.
- Stamens: 6.
- Pistils: Ovary superior.
- Fruits: Capsules brown, rounded at the tip, up to nearly 1/4 inch long, usually slightly shorter than to barely as long as the sepals.
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