Northern Prairie Wildlife Research Center
Northeast Wetland Flora
Field Office Guide to Plant Species
Juncus bufonius L.
- Family: Rush (Juncaceae)
- Flowering: June-November
- Field Marks: This rush differs by its annual growth form and its inflorescence at least 1/4
the length of the entire plant.
- Habitat: Wet soil.
- Habit: Annual with fibrous roots.
- Stems: Single, usually branching at the base, up to 1 foot tall, slender, smooth.
- Leaves: 1-4, elongated, flat or capillary and rolled under along the edges, up to 1/20 inch wide, smooth.
- Flowers: Several in cymes, the cymes at least 1/4 the length of the entire plant or longer, the cymes subtended by short, leaf-like bracts; flowers mostly on one side of the branches of the cyme, sessile or on very short stalks.
- Sepals: 3, free from each other, lanceolate, long-pointed at the tip, green or brownish, up to 1/3 inch long.
- Petals: 3, free from each other, lanceolate, long-pointed at the tip, green or brownish, up to 1/4 inch long.
- Stamens: 3 or 6.
- Pistils: Ovary superior, smooth.
- Fruits: Capsules obovoid, rounded or truncate at the tip but with a short point, green to redbrown, up to 1/6 inch long; seeds oblongoid to ovoid, minute, minutely pointed at both ends.
- Notes: Waterfowl eat the seeds.
Previous Species -- Small-head Rush (Juncus brachycephalus)
Return to Species List -- Group 4
Next Species -- Canada Rush (Juncus canadensis)