The seagrass of the world

Although this paper is primarily meant to be a toxonomic treatment of the marine Angiosperms, some other aspects will be discussed, such as the requirement for life in the sea and the origin, fossil record and geogrphical distribution of these plants.  For the ecological aspects I want to refer to my earlier paper (den Hartog, 1967) on the ecology of sea grass communities in which growht forms, zonation and succession of the sea grasses as well as the structure and function of their ecosystems discussed.