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the flora). Hookeriaceae, once consisting of many genera (W. H. Welch 1966, 1976), is currently recognized as comprising two genera (B. Goffinet et al. 2008;

Central America, South America, Eurasia, Africa, Australia. Species 1. Allen, G. E. 1976. Investigations and current status of insect enemies as biological

Map Legacy Map Fla., La., Tex., West Indies (Cuba, Bahama Islands). Allen, G. E. 1976. Investigations and current status of insect enemies as biological

1978). By 1960 the species was reported as naturalized in Florida (G. E. Allen 1976). Hydrilla verticillata is widely distributed in the Eastern Hemisphere

of the plants used for medicine in eastern Canada. C.Prescott-Allen and R.Prescott-Allen (1986) reported 67 active ingredients from wild plants as occurring

Burke, and J. C. Yount. 1976. Preliminary comments on late Cenozoic glaciations in the Sierra Nevada. In: W. C. Mahaney, ed. 1976. Quaternary Stratigraphy