While staying with friends when they lived in Arizona, I did a lot of driving near their house. I often found these Yucca species. In some respects they look like the grass trees mentioned in the letter X post yesterday, but they are naturally found in the Americas.
Yabbies and crayfish
In Tasmania we have a freshwater burrowing crayfish which is endemic to our state. But many of our crayfish species are being threatened by the mainland yabby which has been introduced into Tasmania. What is the difference between yabbies and crays? Thanks to my friend Sue Waters for sharing her yabby image on Flickr.