Canada Thistle - Phenology Note
Lilacs at the Arnold Arboretum 2010
Midwestern Red Maple
Phenologist John Latimer stands next to a Canada thistle (a Calibration Plant) and discusses the differences between it and its cousin, bull thistle. Latimer briefly touches on aster yellows disease, which affects Canada thistle almost exclusively.
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Go on a silent tour of Arnold Arboretum’s 194 different lilac varieties in both bud and bloom. The Arboretum is located at Harvard University in Massachusetts.
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Get a look at a Midwestern Red Maple tree in the fall. The leaves turn a beautiful red and carpet the ground as fall progresses.
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