Unformatted text preview: of Earth's most
holds up to 1/3 global
Past/ present uses:
horticultural soil additive.
Peat mining in northern
bogs (Canada, Great
Lakes region). *Peat = accumulated undecomposed
organic matter (often remains of
Sphagnum) found in certain types of
wetlands (bogs). Sphagnum Habitat in East Texas:
Spring fed Seeps
Spring Herbaceous seep Forested seep Seedless Vascular Plants (Ch. 17)
(Ch. Vascular plants (conducting tissues: xylem & phloem):
Originated in Devonian (408-387 M.Y.A).
Originated Tracheophytes: branch of embryophyte lineage
Strong selection in Devonian for plants that produced
large numbers of spores.
2 strategies: many small sporphytes (bryophyte way). Big, branched sporophytes (vascular plant way). Lignin (allows rigid structures, height). Sporophyte generation becomes dominant. Seedless Vascular Plants (Ch. 17)
Do not possess se...
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- Spring '14
- Botany, green algae, Fern, Gametophyte, Lycophytes