无忧花届苏木科无忧花属植物，又名四方木、火焰花，乔木，高可达对米，胸径80厘米；树皮灰褐色，小叶4－5对，长圆形、椭圆状长印形或椭圆状倒卵形，花10－30厘米，等片4，椭圆形，长6－7毫米；胚珠6－8个。果带状，花圆形，长15-30厘米，宽5－7厘米，黑褐色，网效明显，花期1 Worry-free flower Hematoxylin Andrographis, also known as Sifang Mu, flame flowers, trees, up to the rice, diameter 80 cm; bark beige, leaflets 4-5 pairs, oblong, oval long print Oval or ovate-obovate, flowers 10-30 cm, etc. 4, oval, 6-7 mm long; ovules 6-8. Fruit banding, flowers round, 15-30 cm long, 5-7 cm wide, dark brown, net effect obvious, flowering 1