Northern Prairie Wildlife Research Center
Western Wetland Flora
Field Office Guide to Plant Species
Juncus longistylis Torr.
- Family: Rush (Juncaceae)
- Flowering: June-August
- Field Marks: This rush is distinguished by its flat, non-septate leaves and its shiny, pointed sepals and petals up to 1/3 inch long.
- Habitat: Along streams, around ponds, in fens, from valleys to the mountains.
- Habit: Perennial herb with creeping rhizomes.
- Stems: Upright, up to 1 3/4 feet tall, smooth.
- Leaves: Alternate, sometimes crowded at the base, elongated, narrow, up to 1/6 inch wide, smooth, flat, not septate.
- Flowers: 3-10 crowded into heads, with 2-8 heads usually somewhat separated from each
other at the tip of the stem, with bracts not surpassing the inflorescence.
- Sepals: 3, green with a pale margin, shiny, broadly lanceolate, pointed at the tip, up to 1/3 inch long.
- Petals: 3, green with a pale margin, shiny, broadly lanceolate, pointed at the tip, up to 1/3 inch long, about as long as or only slightly shorter than the sepals.
- Stamens: 6.
- Pistils: Ovary superior.
- Fruits: Capsules angular, rounded at the tip, about as long as or slightly shorter than the sepals and petals.
- Notes: The seeds are eaten by waterfowl.
Previous Species -- Three-stamen Rush (Juncus ensifolius)
Return to Species List -- Group 4
Next Species -- Merten's Rush (Juncus mertensianus)