May Color Appears at the Washington Park Arboretum

May 20th, 2012 by Pat Chinn-Sloan

Selected cuttings from the Washington Park Arboretum for May 7 - 21, 2012

1)   Rhododendron luteum

  • Also called Yellow Azalea or Honeysuckle Azalea.
  • Despite the sweet perfume, the nectar is toxic. Records of people poisoned by eating the honey date back to 4th century B.C.
  • Cultivated both as an ornamental and as root stock.

2)   Laburnocytisus adamii

  • Also known as Adam’s laburnum or broom laburnum.
  • Considered a horticultural curiosity, some branches produce yellow flowers while other branches produce coppery-pink flowers.
  • Located along Arboretum Drive south just south of the Sassafras.

3)   Paeonia Lutea var. Ludlowii

  • A rare Chinese form of tree peony.
  • Large saucer-shaped blooms appear in late spring in a beautiful clear yellow color.
  • Avoid pruning except to remove large branches.
  • Located along Arboretum Drive across from the Sequoias.

4)   Petteria ramemtacea

  • Fragrant yellow flowers in early summer and tri-foliate leaves make this unusual plant resemble a shrubby golden chain tree.
  • Native to Yugoslavia and Albania.
  • This specimen is located along the east side of Arboretum Drive behind the Dove Tree.

5)   Sophora microphylla

  • Known as the Kowhai tree in its native New Zealand.
  • The blooms of the Kowhai are regarded as New Zealand’s national flower.
  • All parts of the Kowhai, but particularly the seeds, are poisonous to humans.
  • Located along Arboretum Drive