LOWVASI33 - Jim Bidlack BIO 1304 GENERAL BOTANY Lecture 33...

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Jim Bidlack - BIO 1304 GENERAL BOTANY Lecture 33 - Lower Vascular Plants (Part I) I. General Characteristics A. What are they? 1. Evolved plants with simple vascular tissue - ferns and other stuff B. "Lower" vascular plants 1. Simple vascular tissue is present 2. They do not produce seeds - they form spores instead 3. All have swimming sperm cells and require water for fertilization 4. The sporophyte is conspicuous and usually more obvious than the gametophyte C. Phyla of lower vascular plants 1. Psilotophyta (PPPSSSTTTT!) - no true roots; looks like wind-blown hair 2. Lycophyta (like a POGO stick) - "club moss;” looks like an upright pine tree 3. Equisetophyta - looks like a horse’s tail 4. Polypodiophyta (leaves look like a saw that could “tear,” or could be torn) - real ferns D. What "Earth" looked like 260-395 million years ago 1. Most abundant - Lycophyta (herbs and trees) 2. Second - giant Equisetophyta 3. Third – Polypodiophyta (ferns) II. Definitions A.
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