Micronomads of the Mediterranean sea

Abstract

The Structural Heterogeneity of Plants with a Thallus. Plants that evolved in aquatic environments developed a thallus, that is a multicellular body without structures deputed to the mass transportation of water along great distances. The structural organisations of thalli shows a number of different solution to reach the coordination necessary to the expression of differentiation in the multicellular thalli. Some of these structures are comparatively esamined, pointing out their peculiarities. The diversity observed among plants evolved in aquatic environments is expressed not only by the taxa that can be recognized, but also by a great number of solutions developed to express the differentiation of parts in a complex multicellular body.