our thanks to steven zack, president of the american bar association. we also thank our audience is here and on radio television and the internet. tonight's program has been part of the commonwealth club's u.s. constitution in the 21st century series, underwritten by the charles guess he family, and we thank them, and we thank you. [applause] >> the san francisco cons tri of flowers in golden gate park is now showing a new exhibit that changes the way we see the plants around us. amy stewart's best-selling book, "wicked plants" is the inspiration behind the new exhibit that takes us to the dark side of the plant world. >> i am amy stewart. i am the arthur of "wicked plants," the weeds that killed lincoln's mother and other botanical atrocities. with the screens fly trap, that is kind of where everybody went initially, you mean like that? i kind of thought, well, all it does is eat up bugs. that is not very wicked. so what? by wicked, what i mean is that they are poisonous, dangerous, deadly or immoral or maybe illegal or offensive or awful in some way.

our thanks to steven zack, president of the american bar association. we also thank our audience is here and on radio television and the internet. tonight's program has been part of the commonwealth club's u.s. constitution in the 21st century series, underwritten by the charles guess he family, and we thank them, and we thank you. [applause]