ferns - Seedless Vascular Plants Ferns and their Allies...

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Unformatted text preview: Seedless Vascular Plants Ferns and their Allies Learning Objective 6 What features distinguish seedless vascular plants from algae and bryophytes? Seedless Vascular Plants Have adaptations that algae and bryophytes lack vascular tissues dominant sporophyte generation Reproduction depends on water as transport medium for motile sperm cells (as in bryophytes) Learning Objective 7 What are the two phyla of seedless vascular plants? Club Mosses (Phylum Lycopodiophyta) Sporophytes consist of roots, rhizomes, erect branches, and microphylls (leaves) Fig. 27-10a, p. 590 Stem Microphyll Vascular tissue Enation Vein Smooth stem Enation Vascular supply to enation Microphyll (one vein) Fig. 27-10b, p. 590 Thicker main stem Dichotomous end branches Equal branches Vascular tissue Thinner side branch Dichotomously branching stems Overtopping (unequal branching) Planation (branching in same plane) Webbing of side branch system Megaphyll (many veins) Club Mosses Fig. 27-11 (1), p. 591 Nonvascular bryophytes Vascular seedless plants Vascular seed plants Green algal ancestor Fig. 27-11 (a-b), p. 591 Strobilus Leaves (microphylls) Ferns (Phylum Pteridophyta) Largest and most diverse group of seedless vascular plants...
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This note was uploaded on 06/23/2011 for the course BIO 112 taught by Professor Dr.dertein during the Spring '11 term at St. Xavier.

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ferns - Seedless Vascular Plants Ferns and their Allies...

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