lab 13 coniferophyta, gnetophyta. coniferophyta general features of the seed plants common name:...
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Lab 13Coniferophyta, Gnetophyta
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
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
Juniper branches
Coniferophyta
Pine branches
Coniferophyta
Podocarpus
Coniferophyta
Microsporangiate strobili
Coniferophyta
Megasporangiate strobili
Coniferophyta
Pinus fertilization
Coniferophyta
Pinus wood
Coniferophyta
Pinus leaf
Coniferophyta
Pinus pollen cone
Coniferophyta
Pinus pollen tubes
Coniferophyta
Pinus young ovulate cone
Coniferophyta
Pinus young ovulate cone
Coniferophyta
Pinus mature embryo
Coniferophyta
Pine seeds for dissection
Coniferophyta
Conifer seedlings from Lab 2
Coniferophyta
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
Gnetophyta
• Undulipodia (“flagella”): None• Representative genera: Ephedra, Gnetum, Welwitschia
• Recognized by: Compound pollen cones, opposite leaves
Ephedra
Gnetophyta
Ephedra pollen cone
Gnetophyta
Ephedra pollen cone
Gnetophyta
Ephedra seed cone
Gnetophyta