31. It's a common practice in Europe, not only with horse chestnuts , but with willow trees as well. 32. That is the horse chestnut all over. 33. Someone here might know whether horse chestnut is more sensitive to temperature than to length of day. 34. Leading up to the present church with its slate roof is a row of horse chestnut trees. 35. Lucifer's Stone, the daughter of Horse Chestnut , has won three of six starts to earn $ 129, 244. 36. In 1953 the original horse chestnut trees were judged unsafe and a danger to the houses and removed. 37. Q . Last summer the leaves of our neighborhood horse chestnuts turned brown and became dry and brittle. 38. The arboretum currently ( 2014 ) holds 695plant species including exotic rarities such as the Japanese Horse Chestnut . 39. "I'm happy, " said trainer Mike de Kock, who conditions Horse Chestnut for owners Harry and Bridget Oppenheimer. 40. The beetle attacks various species of trees but especially maples, horse chestnuts , black locusts, elms, poplars and green ash.