Jack Phillips (left) helps McCook arborist Bruce Hoffman and Jeff Grewe prepare a slide of a bur oak tree root for the microscope in a lab session during a "Bur Oak Canyon Symposium" Sept. 8 and 9. Cloyd Clark of McCook was among symposium participants who examined oak tree specimens in the classroom and in the canyon southwest of Culbertson. Landscape architect and arborist Gauy Sternberg of Starhill Arboretum, Petersburg, Ill., discussed the diversity of the bur oak tree with a tree enthusiast. (Connie Jo Discoe/McCook Daily Gazette)
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