Figure 1.

Histogram summarizing reported g_night in species among different plant functional groups. For each species, g_night was averaged from all reported values with units in mol m⁻² s⁻¹ presented in Supplemental Table S1 and thus represents a mixture of field and greenhouse studies. The black two-headed arrow at the top left of the graph represents the range for reported g_cuticular taken from many species, and reported g_night within this range may be largely due to g_cuticular rather than g_stomatal. A complete listing of species with references is provided in Supplemental Table S1.