Origin of Land Plants (Embryophytes)
Origin of Land Plants (Embryophytes)
Origin of Land Plants (Embryophytes)
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Subdivision: Zosterophyllophytina<br />
• L. Devonian (or U. Silurian?)<br />
• E.g., Zosterophyllum, Sawdonia, Gosslingia,<br />
Rebuchia (see sheets)<br />
• No leaves<br />
• No roots<br />
• Some naked axes, some with enations<br />
• Dichotomous branching<br />
• Sprg are cauline (on side <strong>of</strong> stem)<br />
• Protosteles circular or elliptical- exarch<br />
• A little more robust than rhyniophytes,<br />
maybe up to 1 m tall<br />
• Sterile and fertile zones on plant<br />
• Evolved from rhyniophytes?- gave rise to<br />
lycopods
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