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Quillwort (Isoetes) (~ 100 Species)

Quillwort (Isoetes) (~ 100 Species). HABITAT. SPOROPHYTE: Two-Lobed Corm (Stem (leaf-bearing), Rhizomorph (root-bearing). Stem. Rhizomorph. Primary Growth (Apical Cell/Apical Meristem). (Leaves, Primary Cortex, Primary Phloem, Primary Xylem). CORM: Primary Growth

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Quillwort (Isoetes) (~ 100 Species)

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  1. Quillwort (Isoetes)(~ 100 Species)

  2. HABITAT

  3. SPOROPHYTE: Two-Lobed Corm (Stem (leaf-bearing), Rhizomorph (root-bearing) Stem Rhizomorph

  4. Primary Growth(Apical Cell/Apical Meristem) (Leaves, Primary Cortex, Primary Phloem, Primary Xylem)

  5. CORM: Primary Growth (Apical Cell/Apical Meristem) (Leaves, Leaf Traces, Primary Cortex, Primary Phloem, Primary Xylem)

  6. CORM: Primary Growth (Apical Cell/Apical Meristem) (Xylem Core) Perpendicular to Groove Through Groove

  7. CORM: Secondary Growth I (Lateral Meristem) (Prismatic Layer, Secondary Cortex)

  8. CORM: Secondary Growth I (Lateral Meristem) (Prismatic Layer, Secondary Cortex)

  9. CORM: Secondary Growth (Lateral Meristem) (Prismatic Layer = Parenchyma + Sieve Cells (+ a few Tracheids))

  10. CORM: Secondary Growth II (Basal Meristem) (Xylem Core, Secondary Cortex, Roots)

  11. Secondary Growth: Secondary Growth(Basal Meristem) (Xylem Core, Secondary Cortex, Roots)

  12. Roots

  13. Stigmaria Roots(Carboniferous ~ 360-300 MYA)

  14. Leaves

  15. Leaves

  16. SPOROPHYTE: • Megasporophylls • Megasporangia • Megaspores • Microsporophylls • Microsporangia • Microspores

  17. SPOROPHYTE: Megasporogenesis Megasporophyll, Megasporangium, Megaspores (Ligule, Velum, Trabeculae, Tapetum)

  18. SPOROPHYTE: Microsporogenesis Microsporophyll, Microsporangium, Microspores (Ligule, Velum, Trabeculae, Tapetum)

  19. GAMETOPHYTE: Microgametogenesis Microspore, Male Gametophyte, Sperm

  20. GAMETOPHYTE: Megagametogenesis Megaspore, Female Gametophyte, Egg

  21. FERTILIZATION AND DEVELOPMENT (Zygote, Embryo) (Endoscopic Development without Suspensor)

  22. ______________________ ____________________

  23. IS IT POLLEN?

  24. IS IT A SEED?

  25. IS IT WOOD?

  26. Pleuromeia (Triassic) Nathorstiana (Cretaceous)

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