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THREAD RUSH

NOMENCLATURE

Other Names: Kissinger grass

 Scientific Name: Juncus filiformis L.

 Plant Family: Juncaceae

GENERAL INFORMATION

Botanical Description: rush

 Stems: tubular (round), erect, reach 1 - 2 feet, 1 mm diameter, arising from rootstock

 Leaves: green, emerge just below flower stem, often longer than stem below the flower cluster

 Roots: creeping stolons, slender underground rhizomes

 Flowers: small greenish flowers on long thin flower stems, clustered around the middle of the stem, less than 20 flowers per cluster, appear July - September

 Seeds: Found in a peanutlike capsule about 1/8 inch long.

 Seedling:

ECONOMIC IMPORTANCE

LIFE CYCLE

Reproduction: perennial

 Propagation: seed, underground stolons

 Dispersal: Stolons may be transferred to new plantings along with vine cuttings.

DISTRIBUTION

State: Most common in the Warrens area.

 National: Found in wetlands and alpine meadows northward from Alaska to Greenland and southward in the Great Lake and Rocky Mountain states.

 Origin:

ENVIRONMENTAL FACTORS

Prefers sandy shores, bogs, and alpine meadows. Easily invades newly planted marshes and empty, wet areas of older beds. Cannot seriously compete with strongly established vines. Prefers peat soil types.

SCOUTING PROCEDURE/ET

While scouting a cranberry bed for disease and insect pests, identify weed populations as they arise. Note the specie(s) of weed present as well as the population level relative to field area. Example: 20% thread rush, 20% boneset and joe-pye weed mix.

REFERENCES

Dana, M. 1987. Cranberry Weeds in Wisconsin. Department of Horticulture, University of Wisconsin-Madison. Madison, Wisconsin. p. 22.

 

Gleason, H. A. 1952. Illustrated Flora of the United States and Adjacent Canada. Vol . 1. Lancaster Press, Lancaster, Pennsylvania. p. 388.

Kummer, L. D., T. G. Dittl, and T. D. Planer. 1993. Wisconsin Cranberry Weeds. Wisconsin Cranberry Board, Wisconsin Rapids, Wisconsin. p. 28.

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