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Rotafolia Songziensis
''Rotafolia songziensis'' is a species of the extinct Sphenophyllales horsetails.Thomas N. Taylor, Edith L. Taylor, Michael Krings: Paleobotany. The Biology and Evolution of Fossil Plants . Second Edition, Academic Press 2009, , p. 333 Description This plant is similar to ''Hamatophyton verticillatum ''Hamatophyton verticillatum'' is a species of the extinct Sphenophyllales Sphenophyllales is an extinct order of articulate land plants and a sister group to the present-day Equisetales (horsetails). They are fossils dating from the Devon ...'' and is found in the Xiejingsi Formation. ''R. songziensis'' consists of branched axes, up to 20 cm long, which have slightly swollen nodes and internodes with ribs and narrow branches produced from the nodes. The axes are protostelic. Cross sections show a roughly triangular or quadrangular organization of the primary xylem and radial arrangement of the secondary xylem. Primary xylem is exarch upon maturation, with protoxy ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Plantae
Plants are predominantly Photosynthesis, photosynthetic eukaryotes of the Kingdom (biology), kingdom Plantae. Historically, the plant kingdom encompassed all living things that were not animals, and included algae and fungi; however, all current definitions of Plantae exclude the fungi and some algae, as well as the prokaryotes (the archaea and bacteria). By one definition, plants form the clade Viridiplantae (Latin name for "green plants") which is sister of the Glaucophyte, Glaucophyta, and consists of the green algae and Embryophyte, Embryophyta (land plants). The latter includes the flowering plants, conifers and other gymnosperms, ferns and Fern ally, their allies, hornworts, liverworts, and mosses. Most plants are multicellular organisms. Green plants obtain most of their energy from sunlight via photosynthesis by primary chloroplasts that are derived from endosymbiosis with cyanobacteria. Their chloroplasts contain chlorophylls a and b, which gives them their green colo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
