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Appendix C <br />State Noxious Weeds <br />Routt County's "weeds of concern". Their control is strongly encouraged by all <br />landowners in the county. Those in bold are known to be problems in the county. <br />1. Absinth wormwood <br />Artemisia absinthium <br />2. African rue <br />Peganum harmala <br />3. Black henbane <br />Hyoscyamus niger <br />4. Black nighshade <br />Solanum nigrum <br />5. Blue mustard <br />Chorispora tenella <br />6. Bouncingbet <br />Saponaria qfflcinalis <br />7. Bull thistle <br />Cirsium vulgare <br />8. Camelthorn <br />Alhagi pseudalhagi <br />9. Canada thistle <br />Cirsium arvense <br />10. Chicory <br />Cichorium intybus <br />11. Chinese clematis <br />Clematis orientalis <br />12. Tarweed, mountain or coastal <br />Madia glomerata or sativa <br />13. Common burdock <br />Arctium minus <br />14. Common crupina <br />Crupina vulgaris <br />15. Common groundsel <br />Senecio vulgaris <br />16. Common mullein <br />Verbascum thapsus <br />17. Common St. Johnswort <br />Hypericum perforatum <br />18. Common tansy <br />Tanacetum vulgare <br />19. Common teasel <br />Dipsacus fullonum <br />20. Cypress spurge <br />Euphorbia cyparissias <br />21. Dame's rocket <br />Hesperis matronalis <br />22. Downy brome <br />Bromus tectorum <br />23. Dyer's woad <br />Isatis tinctoria <br />24. Eurasian watermilfoil <br />Myriophyllum spicatum <br />25. Field bindweed <br />Convolvulus arvensis <br />26. Flixweed <br />Descurainia Sophia <br />27. Giant salvinia <br />Salvinia molesta <br />28. Green foxtail <br />Setaria viridis <br />29. Hairy nightshade <br />Solanum sarrachoides <br />30. Halogeton <br />Halogeton glomeratus <br />31. Houndstongue <br />Cynoglossum officinale <br />32. Hydrilla <br />Hydrilla hydrilla <br />33. Johnson grass <br />Sorghum halepense <br />34. Jointed goatgrass <br />Aegilops cylindrical <br />35. Kochia <br />Kochia scoparia <br />36. Mayweed chamomile <br />Anthemis cotula <br />37. Mediterranean sage <br />Salvia aethiopis <br />38. Medusahead rye <br />Taeniatherum caput -medusae <br />39. Moth mullein <br />Verbascum blattaria <br />40. Musk thistle <br />Carduus nutans <br />41. Myrtle spurge <br />Euphorbia myrsinites <br />10 <br />