Seed plant
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A seed plant or spermatophyte, also known as a phanerogam or a phaenogam, is any plant that produces seeds. It is a category of embryophyte that includes most of the familiar land plants, including the flowering plants and the gymnosperms, but not ferns, mosses, or algae.
Image: Pinus Sylvestris
Image: Acer pseudoplatanus Chaltenbrunnen
Drawing of Runcaria megasporangium and cupule, resembling a seed without a solid seed coat
Plant
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Plants are the eukaryotes that form the kingdom Plantae; they are predominantly photosynthetic. This means that they obtain their energy from sunlight, using chloroplasts derived from endosymbiosis with cyanobacteria to produce sugars from carbon dioxide and water, using the green pigment chlorophyll. Exceptions are parasitic plants that have lost the genes for chlorophyll and photosynthesis, and obtain their energy from other plants or fungi.
Image: Frühling blühender Kirschenbaum
Image: Micrasterias radiata
Image: Red Moss
Image: Glaucocystis nostochinearum