pollen, seeds, and plant reproduction
DESCRIPTION
POLLEN, SEEDS, AND PLANT REPRODUCTION. Life cycle of Selaginella General features of plant reproductive development and ecology Life Cycle of the pines Origin of the seed. Abies amabilis - Oregon. Pinus edulis - New Mexico. Pinus elliottii - Georgia coast. Pinus ponderosa - Colorado mts. - PowerPoint PPT PresentationTRANSCRIPT
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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
![Page 19: POLLEN, SEEDS, AND PLANT REPRODUCTION](https://reader035.vdocuments.us/reader035/viewer/2022081800/5681332c550346895d9a24b2/html5/thumbnails/19.jpg)
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.