smoketree, cotinus coggygria 'Daydream'
Up in Smoke

A haze of fluffy inflorescences now cloaks many of the smoketree (Cotinus) specimens at the Arboretum.

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Ailanthus altissima on mesa
Tree Mob™!

On July 1 at 6pm, consider the Tree of Heaven (Ailanthus altissima), a notorious invasive in our urbanscapes.

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Citizen Science

Observe and record the life cycle events of plants as an Arboretum Tree Spotter. Training Session on July 8.

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What's New

In recognition of his outstanding leadership and advocacy for botanical collections and the public gardens community, Dr. Michael Dosmann has been awarded a professional citation by the American Public Gardens Association.
Nature Photography Workshop
1:00pm, Saturday, July 25, 2015 Arnold Arboretum
Improve your photographs of nature in this half-day workshop–a talk followed by hands-on experience. Learn about composition, color, light, depth of field, and focus.
Free Fun Fridays!
10:00am-3:00pm, July 24, 2015 Arnold Arboretum
Come to the Arboretum on July 24, 2015 and enjoy FREE activities, 10 am to 3 pm, part of the Highland Street Foundation's Free Fun Fridays program.
Exploring the Conifer Collection
6:00pm, Wednesday, July 8, 2015 Arnold Arboretum
Jim Gorman will lead participants through the Arboretum's Conifer Collection, explaining key identification features, natural history, medicinal and economic uses, and horticultural firsts.
From Seed to Tree
1:00pm-2:00pm, Tuesday, July 7 Arnold Arboretum
Get a behind-the-scenes look of the greenhouse growing process, from seed to sprout to seedling to tree.