1.  Think in terms of what we have seen so far in the evolution of land plants.  1. What has had to change in order to move away from water?  2. What do you think will happen next?

2.  http://www.youtube.com/watch?v=UOrx 6aFcEpU&feature=related http://www.youtube.com/watch?v=UOrx 6aFcEpU&feature=related  http://www.youtube.com/watch?v=zKnrl UI85ys http://www.youtube.com/watch?v=zKnrl UI85ys

3.  There are four major classes  Coniferophyta – largest remaining – pine trees  Cycadophyta - Cycads – very similar to ferns.  Ginkgophyta – One remaining species  Gnetophyta – about 70 species.

4.  Scientific name Ginkgo biloba  Considered a living fossil – species is about 270 million years old.  Thought to have been common in disturbed environments (succession)

5.  Ephedra – members of this genus make ephedrin  Welwitschia mirabelis (another single species)  Many woody climbing plants in tropics or sub tropics.

6.  Most are tropical or sub tropical unless moved here – indoor plants.  Very similar to ferns  Reproductive structure similar to cones.  Not Palm Trees.

7.  Should be much more familiar.  One of the dominant types of trees in the northwest.  What kinds of conifers can you name?