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.  Because limited numbers of netleaf hackberry (Celtis reticulata) seedlings are observed in nature, we evaluated patterns of germination of hackberry seeds (n = 2545) that we planted near boulders in the Wasatch Mountain foothills. Seeds were followed over 2 growing seasons. Germination rates were very low overall, but significantly more seeds germinated on the north sides of boulders compared to other boulder aspects. That we found higher rates of germination on the north sides of boulders, instead of on the south sides of boulders where mature hackberry shrubs tend to grow, could reflect year-to-year variation in seed germination and seedling survival but is also consistent with a shift away from warmer and drier sites by hackberry in response to climate change.

Germination of Netleaf Hackberry Seeds on the North Sides of Boulders: A Shift away from Patterns of Mature Hackberry Distribution?