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Moss & Fern. Sphagnum palustre (clones, no spore stage). Hapu’u Tree Fern. 1. Non-vascular plants Division Bryophyta (mosses) Division Hepatophyta (liverworts) Division Anthocerophyta (hornworts) 2. Vascular plants A. No seeds : Division Lycophyta (club mosses)

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slide1

Moss & Fern

Sphagnum palustre

(clones, no spore stage)

Hapu’u Tree Fern

slide3

1. Non-vascular plants

    • Division Bryophyta (mosses)
    • Division Hepatophyta (liverworts)
    • Division Anthocerophyta (hornworts)
  • 2. Vascular plants
    • A. No seeds :
    • Division Lycophyta (club mosses)
    • Division Pterophyta (ferns, horsetails, whisk ferns)
    • B. Production of seeds :
  • 1) No flowers : Gymnosperms
    • Division Coniferophyta (conifers)
    • Division Cycadophyta (cycads)
    • Division Ginkgophyta (ginkgo)
    • Division Gnetophyta (gnetae)
  • 2) Flowers : Angiosperms
  • Division Anthophyta (flowering plants)
slide5

Homosporous vs. Heterosporous Plants

Homosporous

eggs

Single type of spore

Bisexual gametophyte

Sporophyte

sperm

Heterosporous

eggs

Female gametophyte

megaspore

Sporophyte

Male gametophyte

microspore

sperm

bryophytes
Bryophytes
  • phylum Hepatophyta - liverworts
  • phylum Anthocerophyta - hornworts
  • phylum Bryophyta - mosses
slide7

Phylum Bryophyta

  • Gametophyte dominant
  • Lack vascular tissues
  • Homosporous
  • Possess waterproof cuticle
  • Dispersal by windblown spores
  • Swimming sperm
slide11

Alternation of Generations: Mosses

Fuzzy, green, vegetative covering frequently found on rocks in cool, moist habitats = haploid, GAMETOPHYTE stage of moss life cycle

slide12

Alternation of Generations: Mosses

leafy, haploid gametophyte with emerging diploid sporophyte

slide18

Division Pterophyta: Ferns

  • Sporophyte dominant
  • Possess vascular tissues
  • Leaves are megaphylls
  • Homosporous
  • Possess waterproof cuticle
  • Dispersal by windblown spores
  • Swimming sperm
slide20

Alternation of Generations: Ferns

Ferns

Sporophyte = dominant (most conspicuous) individual

Gametophyte = small, fragile structure most people (even botanists!) never notice

slide22

Alternation of Generations: Ferns

Frond = diploid sporophyte

Sorus = collection of sporangia where meiosis occurs

slide28

Alternation of Generations: Ferns

young diploid sporophyte beginning to grow from the haploid gametophyte

slide29

Alternation of Generations: Ferns

young sporophyte produces coiled “fiddleheads” that unfurl into mature fronds