Fig. 1. The mean (a) relative growth rate (RGR), (b) root:shoot ratio (R:S), (c) specific leaf area (SLA), and (d) foliar nitrogen content of A. filiculoides, S. molesta, and V. spiralis plants grown under ambient and elevated [CO2] over 49 days. Error bars represent ± 1 SE and the letters above the error bars indicate whether there were significant within-species trait value differences.