Lab 12

1
Lab 12

• Cycadophyta, Ginkgophyta

2
Seed plants

• General features of the vascular plants
• Common name Seed plants
• Synonyms Spermatophyta
• Sporophyte growth habit Stems, leaves, roots
• Gametophyte growth habit Endosporic thalli

3
Seed plants

• Stele Eustele
• Undulipodia (flagella) Whiplash (100 to 1000)
  or none
• Sexual reproduction Heterosporous
• Included Phyla Cycadophyta, Ginkgophyta,
  Coniferophyta, Gnetophyta, Anthophyta
• Recognized by Seeds, wood, eustele

4
Cycadophyta

• General features of the seed plants
• Common name Cycads
• Synonyms None
• Sporophytes Dioecious trees, shrubs with
  compound leaves and often only a single trunk.
• Strobili Simple pollen cone simple seed cone

5
Cycadophyta

• Undulipodia (flagella) Whiplash, more than 100
• Representative genera Cycas, Zamia
• Recognized by Thick compound leaves, cones

6
P Various cycads
Cycadophyta
7
D Microsporangiate strobili
Cycadophyta
8
D Megasporangiate strobili
Cycadophyta
9
A Cycad seeds
Cycadophyta
10
A Zamia ovule
Cycadophyta
11
A Cycas microsporophyll
Cycadophyta
12
A Cycas microsporophyll
Cycadophyta
13
Ginkgophyta

• General features of the seed plants
• Common name Ginkgo, Maidenhair tree
• Synonyms None
• Sporophytes Dioecious tree
• Strobili Simple pollen cone no seed cone
  (ovules paired on the end of a slender branch)

14
Ginkgophyta

• Undulipodia (flagella) Whiplash, more than
  1000
• Representative genera The single species Ginkgo
  biloba
• Recognized by Fan-shaped leaves, seeds not in
  cones, smelly sarcotesta

15
P Ginkgo
Ginkgophyta
16
D Ginkgo stem
Ginkgophyta
17
D Ginkgo pollen cone
Ginkgophyta
18
A Ginkgo male (pollen) strobilus
Ginkgophyta
19
P Ginkgo seeds
Ginkgophyta
20
P Ginkgo seeds
Ginkgophyta
21
P Ginkgo seeds
Ginkgophyta
22
P Ginkgo seeds
Ginkgophyta
23
P Ginkgo seeds
Ginkgophyta
24
P Ginkgo seeds
Ginkgophyta