| 1. | Cross section of fertile pinnule and indusiate sorus showing anatomical features.
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| 2. | The pinnules eventually rupture to release the sperm and juvenile.
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| 3. | The fossil record includes stems, pinnules, and spores.
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| 4. | Each of these is further subdivided into branchlets ( the pinnules ).
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| 5. | The pinnules are indented, but not further cut.
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| 6. | The eggs stick to the outside of the pinnules where fertilisation takes place.
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| 7. | The deciduous fronds are light yellow-green, long and broad . pinnule.
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| 8. | Fertile pinnules are notably smaller than sterile ones.
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| 9. | Sterile pinnules are larger, while fertile pinnules are narrow, reduced and lobed.
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| 10. | Sterile pinnules are larger, while fertile pinnules are narrow, reduced and lobed.
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