Aesculus californica

The California buckeye or California horse-chestnut is in the horse chestnut or Hippocastanaceae family and is native to southwestern Oregon and California in the United States. It is a large deciduous shrub or a small tree growing up to 12 m tall.

• Leaves are opposite, palmately compound with 5 (rarely 7) leaflets, finely-toothed. Each leaflet is 12—16 cm long and 4—6 cm across, the whole leaf up to 33 cm across, with a long petiole.
• Flowers are white to pale pink, in tall, erect clusters (panicles) 15—20 cm long.
• Fruit is a fig-shaped leathery capsule 5—8 cm long containing a round, orange-brown seed up to 5 cm long. The seeds are slightly poisonous and may cause sickness in some animals when eaten.
• Leaf scars are crescent-shaped, with 7 vascular bundle scars in a half-circle.
• Twigs are stout; terminal buds are large and sticky, 2—3 cm long; lateral bus are much smaller.