Fig. 1.

Interspecific tradeoff between growth capacity (relative growth rate, RGR, in g·g⁻¹·day⁻¹) and low-resource tolerance (intrinsic water-use efficiency, assayed by leaf carbon isotope discrimination, Δ, ‰). Species abbreviations are the first two letters of the genus and specific epithet given in Materials and Methods. Asterisks (*) denote 2 naturalized species.