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.

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