Aesculus glabra

Ohio Buckeye, Fetid Buckeye

Hippocastanaceae

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Habitat

  • native to southeastern and Central United States
  • grows natively in bottom lands along the banks of rivers and streams
  • zone 3

Habit and Form

  • medium shade tree; deciduous
  • broad, rounded crown, with very dense, low branches
  • usually under 30' tall, but can grow to 70' or taller
  • droop and swoop branching limbs grow toward ground, then curve up at tips
  • medium-coarse texture

Summer Foliage

  • opposite, palmately-compound leaves, with 5 leaflets, each 1" to 2" wide and 3" to 6" long; petiole 1" long
  • one of first trees to leaf out in spring (late March to early April)
  • leaves emerge bright green, deepen to dark green

Autumn Foliage

  • colors and defoliates early
  • color ranges from yellow to red-brown; usually pumpkin orange

Flowers

  • blooms in mid-May
  • panicles 4" to 7" long; individual greenish-yellow flowers, 1" wide
  • least ornamental of the genus

Fruit

  • capsule, 1" to 2" long, pear-shaped
  • light brown, prickly capsule opens to reveal a single seed
  • seeds poisonous

Bark

  • ashy-gray
  • corky and warty when young, fissured when older

Culture

  • prefers deep, moist, well-drained, acid soil
  • full sun best

Landscape Use

  • best in natural settings
  • large areas (parks, large grounds) necessary for broad crown

Liabilities

  • dense shade limits grass growth underneath
  • leaf scorch and leaf drop are problems when planted in too small an area
  • leaf blotch, powdery mildew, canker; also an assortment of scales, mealybugs, caterpillars and borers
  • this species and A. hippocastanum most likely to develop troubles of this genus
  • can be messy (leaf, twig, fruit litter)

ID Features

  • large, palmately compound leaves typical of Aesculus
  • confused with A. flava in form
  • fruits have short prickles (A. flava are smooth; A. hippocastanum have long prickles)
  • large terminal bud typical of Aesculus; non-resinous

Propagation

  • by seed
  • must race squirrels to collect seed
  • often used as an understock for grafting cultivars of other Aesculus

Cultivars/Varieties

var. nana - A rare, unusual shrubby form found locally in Georgia. Forms a small, rounded bush to 6' tall.

© Copyright Mark H. Brand, 1997-2015.

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Citation and Acknowledgements: University of Connecticut Plant Database, http://hort.uconn.edu/plants, Mark H. Brand, Department of Plant Science and Landscape Architecture, Storrs, CT 06269-4067 USA.