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Groups, phyla, classes
 

Groups, phyla, classes

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    Groups, phyla, classes Groups, phyla, classes Presentation Transcript

    • Groups, Phyla, Classes
    • 1 Kingdom 2 Groups 10 Phyla 290,000+ Species
    • GroupNonvascular Plants(Bryophytes) Phylum Common Name Estimated # of Species 1. Phylum Liverworts 9,000 Hepatophyta 2. Phylum Hornworts 100 Anthocerophyta 3. Phylum Mosses 15,000 Bryophyta
    • GroupVascular Plants: *Seedless Vascular PlantsPhylum Common Name Estimated # of Species4. Phylum Lycophytes 1,200lycophyta5. Phylum Pterophytes 12,000pterophyta
    • Vascular Plants *Seed Plants -Gymnosperms (seeds are not enclosed in a chamber) Phylum Common Name Estimated # of Species 6. Phylum Ginkgo 1 Ginkgophyta 7. Phylum Cycads 130 Cycadophyta 8. Phylum Gnetophytes 75 Gnetophyta 9. Phylum Conifers 600 Coniferophyta
    • Vascular Plants *Seed Plants -Angiosperms (seeds are contained) Phylum Common Name Estimated # of Species 10. Phylum Flowering plants 250,000 Anthophyta
    • Group: Novascular PlantsNo water-conducting cells (xylem).
    • 1. Phylum Hepatophyta Some liverworts have flattened gametophytes while others have stemlike gametophytes. The gametophytes themselves are liver-shaped.
    • 2. Phylum Anthocerophyta The sporophytes have a long, tapered shape. A hornwort sporophyte lacks seta and consists only of sporangium. Hornworts are often among the first to colonize open area with moist soils. They share a symbiotic relationship with nitrogen-fixing cyanobacteria.
    • 3. Phylum Bryophyta Bryophyta are nonvascular embryophytes that have no water-conducting tissues. Known as mosses, these organisms range in height from less than 1 mm to up to 2 m. Persistent unbranched sporophytes No vascular system
    • Vascular PlantsXylem tissue, true roots, stems & leaves.
    • 4. Phylum Lycophyta Many lycophytes grow on other plants as epiphytes (plants that use other plants as a substrate but are not parasites). Other species grow on forest floors. Others live below ground, gaining nutrients from fungi. It includes sporophytes, club mosses, spike mosses, and quillworts.
    • 5. Phylum Pterophyta Thisphylum includes ferns, horsetails, and whisk ferns and relatives. Ferns radiated from their Devonian origins and grew next to tree lycophytes and horsetails. They are most diverse in the tropics, but there are some species that have adapted to arid climates.
    • 6. Phylum Ginkgophyta There is only one surviving species of this phylum, the Ginkgo biloba. This phylum, and species, has deciduous fanlike leaves that turn gold in the Fall. It tolerates air pollution well.
    • 7. Phylum Cycadophyta The second largest group of gymnosperms, they have large cones and palmlike leaves. Cycads thrived during the Mesozoic era, known as the age of cycads and the age of dinosaurs.
    • 8. Phylum Gnetophyta Have woody vascular system Consists of three genera: Gnetum, Ephedra, and Welwitschia. These have been grouped together based on molecular data.
    • 9. Phylum Coniferophyta Thisphylum is by far the largest of the gymnosperms. Many are large trees. Most conifers are evergreens, remaining green all year round. When spring comes around, conifers already have fully developed leaves.
    • 9. Phylum AnthophytaThisencompasses all angiosperms (flowering plants).The flower itself is a development used for sexual reproduction.Use fruit to encompass seeds.