Robinia pseudoacacia.

Butterfly flower hedgehogs belong to trees. Also known as artichokes. It is about 20 species, native to the temper zone and subtropical regions of North America. Introductions are available in all regions of the world. China was introduced by Japan from 1877 to 1878. In addition to the more common cultivation of hedgehogs, some gardens are planted with burrs and New Mexico hedgehogs. Since 1949, the cultivation range of hedgehogs has been rapidly expanded to 27 provinces (municipalities and autonomous regions) with 23 to 46 degrees north latitude and 124 to 86 degrees east longitude, with the middle and lower reaches of the Yellow River and Huaihe River basin as the center. Vertical distribution up to 2100 meters above sea level.

deciduous broad-leaved trees, up to 30 meters high and with a chest diameter of up to 110 centimeters. Bark gray-brown to dark-brown, split. The twigs are smooth and have tote thorns. Odd plume-like compound leaves, mutual birth, small leaves narrow oval or egg-shaped, thin texture, smooth and hairless on both sides. Butterfly flowers, the total shape of the flower sequence is 10 to 20 cm long, the crown white, with fragrance, 10 pieces of male. The fruit is 4 to 10 cm long and flat. Seeds are flat kidney-shaped, black or brown, often with lighter markings.

hedgehogs are magpie tree species and are not resistant to shade. Happy warm and humid climate, not resistant to cold.

of hedgehog wood is a hard wood, heavy and hard material. When the wood is overloaded, the damage surface is fibrous canine teeth staggered, and the destruction process takes a long time. When the load reaches more than 70% of the pressure limit strength, a creaking sound is generated; This excellent characteristic is most suitable for ore column materials. Wood tough, very suitable for bridge components, mechanical components, wheels, tool handles, axles, sports equipment, etc. , wood wear resistance, suitable for flooring, skis, wooden skis, farm parts, pillows and so on. Strong resistance to decay, suitable for hydropower, earthworking, shipbuilding, keel farming and other materials. Branches, tree roots flammable, firepower, heat, fire time is long, is the high-quality charcoal. Leaves can be used as feed and green fertilizer, flowers are the best source of honey, best-selling nectar on the market, with moderate fragrance, slow crystallization characteristics.