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POLLEN, SEEDS, AND PLANT REPRODUCTION
4. Life cycle of Selaginella5. General features of plant reproductive
development and ecology6. Life Cycle of the pines7. Origin of the seed
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Abies amabilis - Oregon Pinus edulis - New Mexico
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Pinus elliottii - Georgia coast Pinus ponderosa - Colorado mts.
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Pinus aristata - Colorado Sequoia sempervirens - Calif.
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POLLEN AND SEED CONES OF A PINE
Seed cones
pollen cones
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Pollen Cones on a pine tree
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Pine pollen in hand.
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dispersed pollen
Male gametophyte growing in nucellus
early pollen
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The target of the pollen is the ovule -- near the axis of the seed cone.
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POLLEN, SEEDS, AND PLANT REPRODUCTION
4. Life cycle of Selaginella5. General features of plant reproductive
development and ecology6. Life Cycle of the pines7. Origin of the seed
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COAL MEASURE SEQUENCE AT POINT ACONI,CAPE BRETON ISLAND.
COAL
SHALE (MUD STONE) with scattered leaf fossils
SHALE with rootbearing Fossils in place
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Seed fern fossils provide cluews to the origin of the seed.
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Seed fern fossils provide cluews to the origin of the seed.
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Reconstruction of the seed fern Medullosa.
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Reconstructions of seed fern seeds
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Origin of the Seed.
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Origin of the Seed.