Effects of Exogenous Spermidine on Antioxidant System Responses of Typha latifolia L. Under Cd2+ Stress Effects of exogenous iron on lead accumulation in Typha latifolia from a lead-contaminated soil. Studies on the Constltuents of the Flavonoids from the Leaves of Typha angustifolia L. Observation on Floral Morphology of Typha angustifolia, with Implications for Delimitating the Species and T. domingensis Studies on the Constituents of Typha L.—IV. A Preliminary Study of Chemosystematics of Typha L.