The Tree of Life project presents one view of the phylogeny of green plants that is based largely on ultrastructural evidence, and supported by more recent molecular data. According to this view, there are two main groupings of green plants. One grouping consists of the Prasinophytes, Trebouxiophyceae and Ulvophyceae. The other grouping consists of a lineage that has been referred to as the Streprophyta by some authors, and includes a number of green algal groups together with the bryophytes (mosses & relatives) with ferns and other seedless plants as well as the seedplants, including the gymnosperms and angiosperms.

At least some biologists advocate elevating this whole group to the Kingdom level as the Chlorobionta. The 'land plants' that form a component of this branch are treated here as Divisions for consistency with most published undergraduate text books. It is important to realise that the higher-level classification of these organisms is still open to some debate, and will ultimately depend on further molecular studies.

	The Tree of Life project pages dealing with green plants are required reading for this module. There is an assignment related to this page. Please go to the assignments page to complete the assignment online (be sure to verify your completion by emailing yourself the verification page).
	Know more about the Prasinophyceae, a group of scaly green algae. Note: the "know more" resources are located on this website, and enable you to explore a topic in more detail, or to examine a different aspect of the topic under consideration.