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Pollen viability/germinability from 2012 from trees at 2010 m of elevation experimentally subjected to (A) 30, (B) 35, and (C) 40°C. (D) Mean percentage pollen germination when pollen was incubated at 4, 30, 35, and 40°C during pollen dispersal as a precondition treatment and reciprocally germinated at 30 (green), 35 (yellow), and 40°C (red). Error bars represent one standard error from the mean.
