The Arnold Arboretum's continuing adult education program offers one-day and multisession horticulture, botany, and landscape-related courses for the beginner, avid amateur, and professional.
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Much work has gone into attempting to bring back the American chestnut (Castanea dentata), decimated by the exotic chestnut blight fungus (Cryphonectria parasitica) beginning in the late 1800s. Breeding by crossing and back-crossing with Japanese and Chinese species has produced positive results, but genetic engineering is proving more viable. William A. Powell, involved in transgenic research that has produced a tree that is 99.999% American chestnut, will speak about this work and the possibilities for reviving a species once ubiquitous in eastern North American forests.
Fee Free member and student, $10 nonmember
Register at my.arboretum.harvard.edu or call 617-384-5277.