References

Bishop, G.F. and A.J. Davy. 1994. Hieracium pilosella L. (Pilosella officinarum F. Schultz&Schultz-Bip.). Journal of Ecology 82, 195-210.

Wilson, L.M. and M Schwarzländer. 2004. Hawkweeds. In: Coombs, E.M., J.K. Clark, G.L. Piper, and A.F. Cofrancesco, Jr. (eds). Biological control of invasive plants in the United States. Oregon State University Press, Corvallis. p. 444.

Davy, A.J. and G.F. Bishop. 1984. Response of Hieracium pilosella in Breckland grass-heath to inorganic nutrients. Journal of Ecology 72, 319-330.

Reader, R.J. 1990. Competition constrained by low nutrient supply and example involving Hieracium floribundum Wimm & Grab. (Compositae). Functional Ecology 4, 573-577.

Scott, D., J.S. Robertson, and W.J. Archie. 1990. Plant dynamics of New Zealand tussock grassland infested with Hieracium polosella. I. Effects of seasonal grazing, fertilizer and overdrilling. Journal of Applied Ecology 27, 224-234.

Wilson, L. M. and R.H. Callihan. 1999. In: Sheley, R.L., Petroff, J.K.(Eds.), Biology and Management of Noxious Rangeland Weeds. Oregon State University Press, Corvallis, OR, pp. 202-216.

Wilson, L.M., J. Fehrer, S. Bräutigam, and G. Grosskopt. 2006. A new invasive hawkweed, Hieracium glomeratum (Lactuceae, Asteraceae), in the Pacific Northwest. Canadian Journal of Botany 84: 133-142.

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