Cassia fistula seeds

deciduous trees;
Plant: up to 15 meters tall;
Branches: Branches are slender;
Leaves: Pinnately compound leaves 30-40 cm long, without wings or glands on the rachis and petiole; leaflets 3-4 pairs, opposite, broadly ovate, ovate or oblong, 8-13 cm long, The apex is short, acuminate and blunt, the base is cuneate, and the margin is entire. When young, both sides are puberulent, and when old, they are hairless. Both sides are almost the same color. The veins on both sides are obvious; the rachis and petiole are wingless;
Flower: Flower diameter is about 4 cm; pedicel is 3-5 cm long, without bracts; sepals are oval, 1-1.5 cm long, reflexed when blooming; petals are yellow, obovate, nearly equal in size, 2-2.5 cm long, With obvious veins; 10 stamens, 3 of which have long and curved filaments, higher than the petals, 4 of which are short and straight, with wide anthers, and the other 3 are sterile, with longitudinally split anthers;
Fruit: The pod is cylindrical, 30-60 cm long, 2-2.5 cm in diameter, dark brown, indehiscent, with 3 grooves;
Seeds: 40-100 seeds, separated by diaphragms;