1. POLLEN, SEEDS, AND PLANT REPRODUCTION 4.Life cycle of Selaginella 5.General features of plant reproductive development and ecology 6.Life Cycle of the pines 7.Origin of the seed

2. Abies amabilis - Oregon Pinus edulis - New Mexico

3. Pinus elliottii - Georgia coastPinus ponderosa - Colorado mts.

4. Pinus aristata - Colorado Sequoia sempervirens - Calif.

5. POLLEN AND SEED CONES OF A PINE Seed cones pollen cones

6. Pollen Cones on a pine tree

8. Pine pollen in hand.

9. dispersed pollen Male gametophyte growing in nucellus early pollen

11. The target of the pollen is the ovule -- near the axis of the seed cone.

18. POLLEN, SEEDS, AND PLANT REPRODUCTION 4.Life cycle of Selaginella 5.General features of plant reproductive development and ecology 6.Life Cycle of the pines 7.Origin of the seed

19. COAL MEASURE SEQUENCE AT POINT ACONI, CAPE BRETON ISLAND. COAL SHALE (MUD STONE) with scattered leaf fossils SHALE with rootbearing Fossils in place

20. Seed fern fossils provide cluews to the origin of the seed.

22. Reconstruction of the seed fern Medullosa.

23. Reconstructions of seed fern seeds

24. Origin of the Seed.