Includes bibliographical references (pages 64-82).

Abstract. pp. 1. Classification and distribution. pp. 2. Development and reproduction. pp. 3. Physiology. pp. 10. Growth and production. pp. 11. Decomposition. pp. 17. Habitat. pp. 18. Communities and associated biotic limiting factors. pp. 45. Economics. pp. 58. Propagation and management. pp. 59. Control methods. pp. 61. Research needs. pp. 63. References. pp. 64. Appendix A. Sago Pondweed biomasses and probable factors limiting biomass. pp. 83. Appendix B. Origins of nutrient enrichment in wetlands where Sago Pondweed occurred. pp. 85. Appendix C. Bottom substrate types supporting growth of Sago Pondweed. pp. 87. Appendix D. Use of Sago Pondweed as food by groups of waterfowl. pp. 88. Sago pondweed is a submerged macrophyte of nearly cosmopolitan distribution. The plant is of worldwide importance as a waterfowl food but also can be a nuisance in irrigation canals and recreational areas. Future research should concentrate on (1) determining, in a variety of wetland types, the causes of light-limiting turbidity that often suppresses sago growth, (2) understanding the ways in which human activities on and near wetlands affect sago production, and (3) developing reliable and predictable techniques to stimulate sago production for waterfowl by using water level manipulations and other means, in a variety of environmental settings.