Lab 13

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Lab 13

• Coniferophyta, Gnetophyta

2
Coniferophyta

• General features of the seed plants
• Common name Conifers
• Synonyms Pinophyta
• Sporophytes Monoecious or dioecious trees,
  shrubs
• Strobili Simple or clustered pollen cone
  compound seed cone with ovules on cone scales

3
Coniferophyta

• Undulipodia (flagella) None
• Representative genera Abies, Cedrus, Juniperus,
  Metasequoia, Picea, Pinus, Podocarpus, Sequoia,
  Sequoiadendron, Taxodium
• Recognized by Compound seed cones, needle or
  scale leaves

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P Juniper branches
Coniferophyta
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D Pine branches
Coniferophyta
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D Podocarpus
Coniferophyta
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D Microsporangiate strobili
Coniferophyta
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D Megasporangiate strobili
Coniferophyta
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A Pinus fertilization
Coniferophyta
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A Pinus wood
Coniferophyta
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A Pinus leaf
Coniferophyta
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A Pinus pollen cone
Coniferophyta
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A Pinus pollen tubes
Coniferophyta
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A Pinus young ovulate cone
Coniferophyta
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A Pinus young ovulate cone
Coniferophyta
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A Pinus mature embryo
Coniferophyta
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P Pine seeds for dissection
Coniferophyta
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P Conifer seedlings from Lab 2
Coniferophyta
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Gnetophyta

• General features of the seed plants
• Common name Gnetophytes
• Synonyms None
• Sporophytes Dioecious shrubs, vines
• Strobili Compound pollen cone seed cone with
  1-2 ovules

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Gnetophyta

• Undulipodia (flagella) None
• Representative genera Ephedra, Gnetum,
  Welwitschia
• Recognized by Compound pollen cones, opposite
  leaves

21
D Ephedra
Gnetophyta
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D Ephedra pollen cone
Gnetophyta
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D Ephedra pollen cone
Gnetophyta
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D Ephedra seed cone
Gnetophyta