360 million years ago it looked a lot different outside. For one thing, it was a very damp, humid time over much of the earth. Don't worry, there wouldn't have been any dinosaurs to chase you around. ...

Recently, I received an email from Jeff Harang of Calabasas with a photo of a plant whose identity he did know. I had first seen this plant years ago – before the advent of the Internet — but never ...

"The second printing of this book has permitted a few emendations in the keys and correction of some typographical errors, incorrect references, and incorrect names, notably Polystichum lachenense for ...