刺桐是我国南方部分地区公路、城市、居住小区绿化的主要树种之一。但从最近几年的道路绿化实践来看,刺桐作为行道树已经显现出明显的不足,一是树根生长过于旺盛,导致人行道地面隆起;二是生长迅速,需每年进行修剪枝叶,隔两年进行重剪,人力、物力投入高,操作难度大;三是枝条脆,易被风刮断,对行人车辆及沿路线缆存在安全隐患。而与刺桐同科同属的象牙红,其生长较缓慢,属中生树种,落叶小乔木,花色艳丽,花期长,常植于路边、河畔、草坪、林缘及建筑前。 Erythrina is one of the main tree species in the greening of roads, cities and residential areas in parts of southern China. However, from the practice of road greening in recent years, the euryale tree has shown obvious deficiencies as a sidewalk tree. First, the root growth of the tree root is too strong, resulting in the sidewalk surface uplift. Second, it grows rapidly and the branches and leaves need to be pruned each year. After two years Heavy shear, human, material inputs high, difficult to operate; Third, the branches crisp, easy to wind off, the pedestrian vehicles and there is a security risk along the cable. The ivory red with the same family Coleus, its growth is slower, is a middle-aged tree species, deciduous trees, beautiful flowers, long flowering, often planted in the roadside, riverside, lawn, edge and the front of the building.