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  • https://bio.libretexts.org/Courses/University_of_California_Davis/PLS_002%3A_Botany_and_physiology_of_cultivated_plants/03%3A_Origin_and_evolution_of_land_plants/3.02%3A_Biodiversity_(Organismal_Groups)/3.2.02%3A_Early_Land_Plants/3.2.2.03%3A_Seedless_Vascular_Plants
    Seedless vascular plants have lignified vascular tissue that allows them to transport water through woody xylem cells up from true roots, through the stems, up to their leaves. Photosynthetic tissues ...Seedless vascular plants have lignified vascular tissue that allows them to transport water through woody xylem cells up from true roots, through the stems, up to their leaves. Photosynthetic tissues can distribute sugars through living phloem cells throughout the plant. SVPs are sporophyte dominant with reduced, thalloid gametophytes. Sporophytes are branched with many sites for spore production. They can be divided into two lineages: Lycopodiopsida and Polypodiopsida.
  • https://bio.libretexts.org/Courses/Norco_College/BIO_5%3A_General_Botany_(Friedrich_Finnern)/20%3A_Early_Land_Plants/20.06%3A_Seedless_Vascular_Plants
    Seedless vascular plants have lignified vascular tissue that allows them to transport water through woody xylem cells up from true roots, through the stems, up to their leaves. Photosynthetic tissues ...Seedless vascular plants have lignified vascular tissue that allows them to transport water through woody xylem cells up from true roots, through the stems, up to their leaves. Photosynthetic tissues can distribute sugars through living phloem cells throughout the plant. SVPs are sporophyte dominant with reduced, thalloid gametophytes. Sporophytes are branched with many sites for spore production. They can be divided into two lineages: Lycopodiopsida and Polypodiopsida.
  • https://bio.libretexts.org/Bookshelves/Botany/Botany_Lab_Manual_(Morrow)/21%3A_Seedless_Vascular_Plants/21.3%3A_Lycophytes_(Class_Lycopodiopsida)
    Much of the fossil fuels we use today are derived from these extinct arboreal lycophytes falling into swamps, slowing decomposition and creating layers of carbon-rich material that we now find as coal...Much of the fossil fuels we use today are derived from these extinct arboreal lycophytes falling into swamps, slowing decomposition and creating layers of carbon-rich material that we now find as coal seams. Draw and describe the important characteristics that differentiate these plants from bryophytes, including stem and leaf structure, below ground parts, and where spores are produced.
  • https://bio.libretexts.org/Bookshelves/Introductory_and_General_Biology/Biology_(Kimball)/19%3A_The_Diversity_of_Life/19.01%3A_Eukaryotic_Life/19.1.05%3A_Diversity_and_Evolutionary_Relationships_of_the_Plants
    This page explains the classification of plants in a single clade based on shared traits, identifying key groups like green algae, bryophytes, lycopsids, horsetails, ferns, and seed plants. Seed plant...This page explains the classification of plants in a single clade based on shared traits, identifying key groups like green algae, bryophytes, lycopsids, horsetails, ferns, and seed plants. Seed plants are divided into gymnosperms and angiosperms, the latter further categorized into monocots and dicots. Monocots have unique features like a single cotyledon and parallel leaf venation, while dicots possess two cotyledons and netted venation.
  • https://bio.libretexts.org/Bookshelves/Botany/Botany_(Ha_Morrow_and_Algiers)/02%3A_Biodiversity_(Organismal_Groups)/2.05%3A_Early_Land_Plants/2.5.03%3A_Seedless_Vascular_Plants
    Seedless vascular plants have lignified vascular tissue that allows them to transport water through woody xylem cells up from true roots, through the stems, up to their leaves. Photosynthetic tissues ...Seedless vascular plants have lignified vascular tissue that allows them to transport water through woody xylem cells up from true roots, through the stems, up to their leaves. Photosynthetic tissues can distribute sugars through living phloem cells throughout the plant. SVPs are sporophyte dominant with reduced, thalloid gametophytes. Sporophytes are branched with many sites for spore production. They can be divided into two lineages: Lycopodiopsida and Polypodiopsida.
  • https://bio.libretexts.org/Bookshelves/Botany/Introduction_to_Botany_(Shipunov)/06%3A_Growing_Diversity_of_Plants/6.02%3A_Pteridophyta_-_the_Ferns
    Pteridophyta, ferns and allies, have approximately 12,000 species and six classes. They have a sporic life cycle with sporophyte predominance whereas their gametophytes are often reduced to prothalliu...Pteridophyta, ferns and allies, have approximately 12,000 species and six classes. They have a sporic life cycle with sporophyte predominance whereas their gametophytes are often reduced to prothallium, small hornwort-like plant. Another frequent variant is the underground, mycoparasitic gametophyte. Pteridophyta (with one exception) have true roots. Most of them have vascular tissues and are homoiohydric. This is why seed plants together with ferns have a name vascular plants.

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