Houndstongue

Scientific name: Cynoglossum officinale L.

Common names: Houndstongue, gypsy flower, rats and mice, dog bur

Native To: Eurasia

Date of U.S. Introduction: Mid 1800s

Images: Invasive.org and Google

Means of Introduction: Introduced accidentally through contaminated seed

Impact: Toxic to livestock

Current U.S. Distribution: PLANTS Database map (see complete PLANTS Profile for county distribution and native status)

Management Plans: Plants

Selected Internet Resources:

• Federal Government
• State Government
• University/Academic
• International
• Organizations

Cynoglossum officinale L.
Integrated Taxonomic Information System.
Taxonomy

Cynoglossum officinale L. (Houndstongue) - Noxious and Nuisance Plant Management Information System (PMIS)
United States Army Corps of Engineers. Engineer Research and Development Center. Environmental Laboratory.
Identification/Description; Photographs; Impacts; Habitat; Distribution

Cynoglossum officinale Article Citation Search - AGRICOLA Database
USDA. National Agricultural Library.
Research; Special Note: NAL Catalog Search (resources)

Cynoglossum officinale L. - Germplasm Resources Information Network (GRIN)
USDA. ARS. National Genetic Resources Program.
Taxonomy; Distribution; Legal Aspects

Cynoglossum officinale - Fire Effects Information System (FEIS)
USDA. Forest Service. Rocky Mountain Research Station. Fire Sciences Laboratory.
Taxonomy; Identification/Description; Photographs; Impacts; Life Cycle; Habitat; Distribution; Dispersion; Controls; Special Note: References

Hound's-tongue - Noxious Weed
USDA. Sawtooth National Forest.
Identification/Description; Photographs; Impacts; Controls

Plant profile for Cynoglossum officinale - PLANTS Database
USDA. NRCS. National Plant Data Center.
Taxonomy; Photographs; Illustrations; Distribution; Legal Aspects

Cynoglossum officinale - Species Abstracts of Highly Disruptive Exotic Plants at Scotts Bluff National Monument
DOI. Northern Prairie Wildlife Research Center.
Identification/Description; Life Cycle; Distribution; Controls; Special Note: References

Houndstongue - Best Management Practices Weed Profile (PDF | 219 KB)
Colorado State Parks.
Identification/Description; Illustrations; Introduction History; Impacts; Habitat; Distribution; Controls; Special Note: References

Houndstongue - Noxious Weed Information Series (PDF | 319 KB)
State of Colorado. Jefferson County. Weed and Pest Management Program.
Identification/Description; Photographs; Controls

Houndstongue (Cynoglossum officinale)
State of Colorado. Larimer County. Weed Control District.
Identification/Description; Photographs; Impacts; Controls

Houndstongue - Noxious Weeds of Mesa County
State of Colorado. Mesa County. Pest Management.
Identification/Description; Impacts; Controls

Houndstongue
Washington State Noxious Weed Control Board.
Identification/Description; Photographs; Impacts; Habitat; Distribution; Controls; Special Note: References

Houndstongue
State of Washington. Stevens County Noxious Weed Control Board.
Identification/Description; Photographs; Impacts; Habitat; Controls

Cynoglossum officinale L. - Wisconsin Botanical Information System
Wisconsin State Herbarium; University of Wisconsin-Madison.
Photographs; Distribution

Houndstongue (PDF | 104 KB)
Colorado State University. Colorado Environmental Pesticide Education Program.
Identification/Description; Introduction History; Impacts; Life Cycle; Distribution; Controls; Legal Aspects; Special Note: Resources

Houndstongue: Biology and Management - MontGuide Fact Sheet
Montana State University. Extension Service.
Identification/Description; Illustrations; Introduction History; Impacts; Life Cycle; Dispersion; Controls

Houndstongue - Noxious Weed Alert (PDF | 783 KB)
Montana State University. Extension Service.
Identification/Description; Photographs; Impacts; Life Cycle; Habitat; Dispersion; Controls

Managing Houndstongue (PDF | 239 KB)
University of Nevada - Reno. Cooperative Extension.
Identification/Description; Photographs; Introduction History; Impacts; Life Cycle; Habitat; Dispersion; Controls

Hounds Tongue Wanted Poster--Dead, Not Alive! (PDF | 217 KB)
University of Nevada - Reno. Cooperative Extension.
Identification/Description; Photographs; Impacts

Cynoglossum officinale L.
University of Wisconsin - Stevens Point. Robert W. Freckmann Herbarium.
Identification/Description; Photographs; Habitat; Distribution

Hound's Tongue (PDF | 195 KB)
Alberta Invasive Plants Council (Canada).
Identification/Description; Photographs; Controls

Hound's-tongue - Field Guide to Noxious and Other Selected Weeds of British Columbia
British Columbia Ministry of Agriculture, Food, and Fisheries (Canada).
Identification/Description; Photographs; Impacts; Habitat; Dispersion

Hound's-Tongue - Guide to Weeds in British Columbia
British Columbia Ministry of Agriculture, Food, and Fisheries (Canada).
Identification/Description; Photographs; Illustrations; Impacts; Life Cycle; Habitat; Distribution; Dispersion; Controls

Fact Sheets For Some Common Plants On Rangelands In Western Canada: Cynoglossum officinale L.
University of Saskatchewan (Canada). Rangeland Ecosystems and Plants.
Identification/Description; Photographs; Introduction History; Habitat; Distribution; Dispersion; Controls; Special Note: References

Cynoglossum officinale (herb) - ISSG Global Invasive Species Database
World Conservation Union. Invasive Species Specialist Group.
Taxonomy; Identification/Description; Photographs; Impacts; Life Cycle; Habitat; Distribution; Controls

Houndstongue
Colorado Weed Management Association.
Identification/Description; Photographs; Life Cycle; Habitat; Distribution; Dispersion

Houndstongue - Noxious Weed Identification
Missoula County Weed District.
Identification/Description; Photographs; Life Cycle; Habitat; Dispersion; Controls

Houndstongue
Montana War on Weeds.
Identification/Description; Photographs; Impacts; Dispersion; Controls

Houndstongue
Montana Weed Control Association.
Identification/Description; Photographs; Impacts; Life Cycle; Dispersion