Locust, also known as acacia, native to North America, now widely introduced to Asia and Europe. Locust bark thick, dark, multi-grain split; leaves the roots of a pair of 1-2 mm long barbed; flowers white, fragrant, spike; fruit pods, each pod has 4-10 seeds. Deciduous tree, 10-20 m high. Bark gray-brown, longitudinal; branch of acupuncture with stipule, twig brown, glabrous or slightly pubescent with childhood. Odd pinnate, alternate, with 9-19 leaflets; petiole 1-3 cm long, petiolule about 2 mm, pubescent, small leaves ovate or ovate oblong, 2.5-5 cm wide, 1.5-3 cm, base widely cuneate or nearly circular, apex rounded or slightly concave, with small sharp spines, margin entire, green surface, was slightly pubescent, gray-green back was short-haired. Racemes axillary, shorter than the leaves, rachis brown, short hair is sparse; pedicels 8-13 mm. Pubescent, calyx bell-shaped, with five irregular teeth crack, the surface is short hair; corolla white, fragrant, nearly round the flag flap, length of 18 mm, base with claw, apex slightly concave, petals obovate oblong, base with a slender claw, top round, length 18 mm, long bone inwards, the base with long claws; stamens 10, 9 and 1 into a two-body; ovary linear-oblong, white hair was short, Style bent almost at right angles, flat pod, linear oblong, 3-11 cm, brown, smooth. Containing 3-10 seeds, two split. Fruit period from May to September. 

 In addition to love, what they should not leave; in addition to memories, what they should not take away. "This is a new era of the city logo, let us join the initiative: I start, start now, to strengthen environmental awareness, care of plants, and promote the harmonious development of the social environment, so that civilization and beautiful forever with us home! green on my side in you, who give their lovely trees, people admire the spirit of public service, when summer saw the bamboo willow, willow trees and fast-growing feeling of coolness when full, every smell Xianghua Huai, Pelargonium Huai atmosphere, it's very refreshing, and we firmly believe that: have your love, our homes more beautiful! 
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