WebJun 11, 2024 · Pteridophtyes are a phylum of plants. They are the vascular plants (those having xylem and phloem tissues) that reproduce by releasing spores rather than seeds, … WebFAMILY: SELAGINELLACEAE . Leaves distinctly ligulate; presence of trabeculated endodermal zone in the stem axis ; two types of sporangia with sporophylls, microsporangia with many microspores and mega-sporangia with a few megaspores. GENUS: SELAGINELLA . 4. Isoetes: Plant Body (Sporophyte): The plant appears as ordinary tufted grass.
List of 28 Pteridophytes (With Diagram) - Biology Discussion
WebThe Pteridophyte Phylogeny Group, or PPG, is an informal international group of systematic botanists who collaborate to establish a consensus on the classification of pteridophytes … WebFeb 13, 2014 · The concept of family has always been fluid in ferns and, up to now, no clear family concept has been established. Families are generally defined as one or more genera that share several morphological characteristics, and many angiosperm families have had a long history of recognition based on shared floral and fruit features. hiflysports
Fern Description, Features, Evolution, & Taxonomy
WebTraditionally, all of the spore producing vascular plants were informally denominated the pteridophytes, rendering the term synonymous with ferns and fern allies. This can be confusing because members of the division Pteridophyta were also denominated pteridophytes ( sensu stricto ). WebFeb 13, 2014 · Gametophytes, often called prothalli, produce gametes through mitosis: male gametes, formed in antheridia, swim to the archegonia where female gametes are produced. The mobile, free-swimming, flagellate male cells are the reason for the water dependence of ferns; water is required for their movement from one gametophyte to another. WebSubjects: 1805-1877 1808-1865 1809-1884 Botanical specimens Braun, Alexander, Correspondence Engelmann, George, Letters Pteridophyta Sturm, Johann Wilhelm, BHL Collections: Engelmann Papers, Missouri Botanical Garden. Correspondence : Vasey (George) and Engelmann (George), 1849-1883. View Metadata. hifushougai