Ferns and Fern Allies

Ferns and Fern Allies - 1. Phyla Pterophyta & Lycophyta:...

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1. a. Seedless vascular plants, non-flowering, have a vascular system of fluid conducting xylem and phloem. b. All possess sporophylls: leaf-like structures of the sporophyte generation that bear spores. i. Megaphylls : several to many veins or Microphylls : with one vein. ii. Sporangia : form on sporophylls, are where spores are produced by meiosis. They are on the backs of leaves; this is why the leaves are called sporophylls. Groups of sporangia are called sori . Sporangia may be protected by a shield-shaped indusium (specialized growth of a frond). c. All are primarily homosporous, vascular plants, motile sperm, and external water is necessary for fertilization. d. Pterophyta : i. Ferns : Leaves are megaphylls that uncoil as they mature, sporophytes and all gametophytes are photosynthetic. 1. Reproduction : Spores germinate and form a thread-like protonema . Subsequent cellular divisions form the heart-shaped prothallium . Rhizoids and male and female reproductive
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This lab report was uploaded on 04/10/2008 for the course BIO 1106 taught by Professor Youngblood,aaron during the Spring '08 term at Baylor.

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Ferns and Fern Allies - 1. Phyla Pterophyta & Lycophyta:...

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