Aesculus hippocastanum 'Baumannii'
Common name: 
Double Horsechestnut
Nutless Horsechestnut
ES-ku-lus hip-o-kas-TA-num
Sapindaceae, Hippocastanaceae
Native to (or naturalized in) Oregon: 
  • Deciduous tree, taller and narrower than the species.  Blooms later than the usual horsechestnut; the flowers are white and pink, double, and reportedly last longer.  The flowers are mostly sterile so only a few fruit are produced.
  • Sun or light shade, well-drained soil, pH adaptable, avoid extremely dry situations.
  • Hardy to USDA Zone (3) 4     Constantin A. N. Baumann found a sport on a otherwise normal garden tree in Geneva, Switzerland in 1819.  It has been sold in North America since about 1850 (Jacobson, 1996).
Click image to enlarge
  • plant habit, start of flowering

    plant habit, start of flowering

  • plant habit, flowering

    plant habit, flowering

  • foliage and flower clusters

    foliage and flower clusters

  • flower cluster

    flower cluster