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Western Wetland Flora

Field Office Guide to Plant Species

Long-style Rush
Juncus longistylis Torr.

JPG -- Species Photo JPG -- Distribution Map

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)

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