Fig. 2.

Hydrogen and oxygen isotope offsets between source water, xylem water, and cryogenically extracted stem water in the nine plant species. A, B, and C refer to oxygen isotope offsets between cryogenically extracted stem water and source water, xylem water and source water, and cryogenically extracted stem water and source water, respectively. D, E, and F refer to hydrogen isotope offsets between cryogenically extracted stem water and source water, xylem water and source water, and cryogenically extracted stem water and source water, respectively. Presence of asterisk above or below a bar indicates that the value is significantly different from zero. White, light-gray, and dark-gray bars indicate species from xeric, saline, and mesic habitats, respectively.