Quillwort Isoetes HABITAT SPOROPHYTE TwoLobed Corm Stem Rhizomorph
Quillwort (Isoetes)
HABITAT
SPOROPHYTE: Two-Lobed Corm (Stem, Rhizomorph) Stem Rhizomorph
Primary Growth (Apical Cell/Apical Meristem) (Leaves, Xylem Core)
CORM: Primary Growth (Apical Cell/Apical Meristem)
CORM: Primary Growth (Leaves)
CORM: Primary Growth (Leaves)
CORM: Primary Growth (Xylem Core) Through Groove Perpendicular to Groove
CORM: Secondary Growth (Lateral Meristem) (Prismatic Layer, Secondary Cortex)
CORM: Secondary Growth (Lateral Meristem) (Prismatic Layer, Secondary Cortex)
CORM: Secondary Growth (Prismatic Layer)
CORM: Secondary Growth (Basal Meristem) (Xylem Core, Roots)
Secondary Growth: Secondary Growth (Basal Meristem) (Xylem Core, Roots)
Secondary Growth: Basal Meristem (Root)
Stigmaria Roots (Carboniferous ~ 360 -300 MYA)
SPOROPHYTE: • Megasporophylls • Megasporangia • Megaspores • Microsporophylls • Microsporangia • Microspores
SPOROPHYTE: Megasporogenesis Megasporophyll, Megasporangium, Megaspores (Ligule, Velum, Trabeculae, Tapetum)
SPOROPHYTE: Microsporogenesis Microsporophyll, Microsporangium, Microspores (Ligule, Velum, Trabeculae, Tapetum)
GAMETOPHYTE: Microgametogenesis Microspore, Male Gametophyte, Sperm
GAMETOPHYTE: Megagametogenesis Megaspore, Female Gametophyte, Egg
FERTILIZATION AND DEVELOPMENT (Zygote, Embryo) (Endoscopic Development without Suspensor)
IS IT A SEED?
IS IT WOOD?
Pleuromeia (Triassic) Nathorstiana (Cretaceous)
- Slides: 25