Studies on the Constltuents of the Flavonoids from the Leaves of Typha angustifolia L. Effect of Cu2+ stress on the growth and physiological properties of Typha angustifolia The kinetics characteristic of Cd2+ absorption of Typha angustifolia Study on chemical constituents in pollen of Typha angustifolia Analysis on Contents of Flavonoids and Polysaccharides in Pollen of Typha angustifolia L. and Its Different Processed Products