Allaira petiolata, Garlic Mustard: An ongoing effort in Invasive Removals

April 30 2015 RHR 261

Last month, the Arboretum held the annual Crum Creek Clean-up.

With the help of 40 staff, faculty, students, and volunteers, the following items were removed from Crum Creek and the surrounding woods.
-19 bags of trash
– 1 hose
– 16 tires
– 8 metal U-posts and 7 tree cages
– 1 wooden pallet
– 1 large sheet of metal
– 1 remote control boat
– 1 swivel chair
– 1 wooden split-rail fence post
– 1 piece of plywood
– 6 pieces/blocks of wood

 

Sandy Whipple, volunteer, continued the effort to control invasives in the Crum Woods, including the now in bloom, garlic mustard (Alliaria petiolata.) photo credit: R. Robert

Sandy Whipple, volunteer, continued the effort to control invasives in the Crum Woods, including

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Plants of the Week: May 11

Osmanthus x burkwoodii JTB [1]Osmanthus x burkwoodii

This shrub caught my eye in the John W. Nason Garden. My first reaction was to identify it as a member of the olive family Oleaceae with no further estimations of identity, only to be honestly surprised by the accession tag. My naïve preconceptions of the genus Osmanthus led me to believe that they all resembled false-holly (Osmanthus heterophyllus) in one way or another; the old aphorism “we learn something new every day” rings in my head as I take another tiny step from chump-dom. The flowers are soft white, x-shaped and fragrant while the …

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Xanthoceras sorbifolium

Xanthoceras sorbifolium

The once-private garden of our first director, John Wister, has many rare horticulture gems. Upon his widow’s death, the garden was opened to the public along with all its horticultural delights. Known as a spring garden, visitors are so entranced by the daffodils and other unique spring bulbs on the floor of the garden they forget to look up.

In the canopy of the Wister garden, the virtually unknown Xanthoceras sorbifolium, yellowhorn, is blooming this month. Introduced in 1866 from northern China, its fragrant flowers bloom on long, 6- to 10-inch, racemes. The thin white petals of each flower …

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