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Biodiversity links
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Plant biodiversity and "plant of the week" (USDA)
 NY Botanical Garden herbarium
Plant guide from Field Museum (Chicago)
Encyclopedia of life
I. Taxonomy (classification)
Kingdom: Plants - fig. 22-2
 Division Bryophyta (mosses)
 Division Pteridophyta (ferns)(two other Divisions contain club mosses and horsetails)
 Division Coniferophyta/Gymnosperms (cone-bearing)
 Division Angiosperms (flowering plants)· class monocots· class dicots
A. distinction between plants and algae – fig. 22-2, p. 635
B. non-vascular plants – mosses (p. 556-559)
1. no water transportation system
2. alternation of generations, with haploid (gametophyte) dominating (fig. 22-5, p. 637); 22-11, p. 642
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 sporophyte – plant life phase that produces spores gametophyte – plant life phase that produces gametes.
(which unite to form seeds in some plants)
3. importance of mosses – habitats where they are found
B. vascular plants without seeds (ferns, horsetails, and clubmosses)
1. sporophyte generation (diploid) dominates (fig. 22-14; p. 645)
2. spores produced for reproduction. Stored in sori.
3. vascular system for transporting water: a. transpiration is the name for the process b. xylem - long cells connected together to form a tube; transport water from roots to leaves.
How does transport work? (p. 685-
687 )

 capillary action - adhesion and cohesion xylem tubes form annual rings in some plants c. phloem – long cells connected together to form a tube; transport sugar (food) from leaves to other parts of the plant.
C. Division gymnosperms (= naked seed)
1. sporophyte generation dominates (fig. 22-15, p. 647;
22-17)
2. seeds are produced, but have no covering (naked)
3. most gymnosperm seeds are produced in cones.
 cycads and ginkgos are an exception
D. Division angiosperms
1. sporophyte generation dominates (fig. 22-18; 24-6)
2. seeds produced in flowers and protected by a fruit.
3. flower anatomy and seed production see figure 22-18; 24-1
4.pollination and symbiosis - fig 24-4
 what do flowers look like to pollinators? Check out some pictures.
 interactive - match pollinators and flowers
5. function of fruit is to protect and spread the seeds.
6. methods of spreading seeds - p. 702
7. class monocots (fig. 22-22)
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 one-part seed
 three part flowers
 parallel veins vascular tissue in rings
 examples:
8. class dicots (fig. 22-22)
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 two-part seeds
 4 or 5 part flowers
 netted or branching veins vascular tissue in bundles secondary growth

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 examples: check out the orchid gallery
The world's oldest trees: Explore Bristlecone pines (opens in Google Earth)