Late Summer Cuttings from the Washington Park Arboretum

Selected cuttings from the Washington Park Arboretum, August 19, 2019 - September 1, 2019
Roy Farrow
Selected cuttings from the Washington Park Arboretum, August 19, 2019 – September 1, 2019

1)  Castanea dentata                          American Chestnut

  • The American Chestnut, once an important and substantial member of the East Coast hardwood forests, is now all but extinct in the wild due to the chestnut blight that likely arrived from Japan in the 1890s.
  • Chestnuts are sweet and edible, though hidden inside a prickly burr.
  • Blight resistant cultivars are still being developed in order to bring back this majestic tree.
  • Castanea trees of several species can be found both in our Oak Collection and in our old field nursery just south of Crab Apple Meadow, along the eastern fenceline.

2)  Hydrangea macrophylla  ‘Blue Wave’                          Lacecap Hydrangea

  • This gorgeous Lacecap Hydrangea produces reliably blue flowers in most soil types without adding acidifying compounds.
  • The tiny fertile flowers remain deep blue as the larger infertile flowers age from blue to lavender.
  • This and many other hydrangea species are blooming now in Rhododendron Glen.

3)  Magnolia sprengeri  ‘Diva’                          Goddess Magnolia

  • Although known for stunning flowers in spring, the Goddess Magnolia produces eye-catching fruit in late summer.
  • Many Magnolia fruits are large with bizarre shapes, sometimes turning red as the seed ripen.
  • The Goddess Magnolia, as well as many others, can be found in Rhododendron Glen.

4)  Ostrya carpinifolia                         Hop Hornbeam

  • This European species of Ostrya produces many fruit clusters in bladder-like involucre bracts that resemble the fruit of hops.
  • Ostrya carpinifolia can be found along Foster Island Drive near its east terminus.

5)  Sorbus x splendida                          Hybrid Mountain Ash

  • Being in the subfamily Maloideae of the plant family Rosaceae, the fruit of Sorbus are pomes, similar to an apple or pear and are often brightly-colored.
  • Visit the Brian O. Mulligan Sorbus Collection along Arboretum Drive, across from our Magnolia Collection.