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Lab 12

Lab 12. Cycadophyta, Ginkgophyta. Seed plants. General features of the vascular plants Common name : Seed plants Synonyms : Spermatophyta Sporophyte growth habit : Stems, leaves, roots Gametophyte growth habit : Endosporic thalli. Seed plants. Stele : Eustele

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Lab 12

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  1. Lab 12 Cycadophyta, Ginkgophyta

  2. Seed plants • General features of the vascular plants • Common name: Seed plants • Synonyms: Spermatophyta • Sporophyte growth habit: Stems, leaves, roots • Gametophyte growth habit: Endosporic thalli

  3. Seed plants • Stele: Eustele • Undulipodia (“flagella”): Whiplash (100 to 1000+) or none • Sexual reproduction: Heterosporous • Included Phyla: Cycadophyta, Ginkgophyta, Coniferophyta, Gnetophyta, Anthophyta • Recognized by: Seeds, wood, eustele

  4. Cycadophyta • General features of the seed plants • Common name: Cycads • Synonyms: None • Sporophytes: Dioecious; trees, shrubs with compound leaves and often only a single trunk. • Strobili: Simple pollen cone; simple seed cone

  5. Cycadophyta • Undulipodia (“flagella”): Whiplash, more than 100 • Representative genera: Cycas, Zamia • Recognized by: Thick compound leaves, cones

  6. P Various cycads Cycadophyta

  7. D Microsporangiate strobili Cycadophyta

  8. D Megasporangiate strobili Cycadophyta

  9. A Cycad seeds Cycadophyta

  10. AZamia ovule Cycadophyta

  11. ACycas microsporophyll Cycadophyta

  12. ACycas microsporophyll Cycadophyta

  13. Ginkgophyta • General features of the seed plants • Common name: Ginkgo, Maidenhair tree • Synonyms: None • Sporophytes: Dioecious; tree • Strobili: Simple pollen cone; no seed cone (ovules paired on the end of a slender branch)

  14. Ginkgophyta • Undulipodia (“flagella”): Whiplash, more than 1000 • Representative genera: The single species Ginkgo biloba • Recognized by: Fan-shaped leaves, seeds not in cones, smelly sarcotesta

  15. PGinkgo Ginkgophyta

  16. DGinkgo stem Ginkgophyta

  17. DGinkgo pollen cone Ginkgophyta

  18. AGinkgo “male” (pollen) strobilus Ginkgophyta

  19. PGinkgo seeds Ginkgophyta

  20. PGinkgo seeds Ginkgophyta

  21. PGinkgo seeds Ginkgophyta

  22. PGinkgo seeds Ginkgophyta

  23. PGinkgo seeds Ginkgophyta

  24. PGinkgo seeds Ginkgophyta

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