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)