Dry Weight (Biomass) References
Cirsium arvense (L.) Scop. [Canadian Thistle]
Ziska, L.H. 2002. Influence of rising atmospheric CO2 since 1900 on early growth and photosynthetic response of a noxious invasive weed, Canada thistle (Cirsium arvense). Functional Plant Biology 29: 1387-1392.
Ziska, L.H., Faulkner, S. and Lydon, J. 2004. Changes in biomass and root:shoot ratio of field-grown Canada thistle (Cirsium arvense), a noxious, invasive weed, with elevated CO2: implications for control with glyphosate. Weed Science 52: 584-588.