This plant is from Borneo, the leaves are green with silver pattern. It has purple flower in the morning. The flower last for a day, and by the next moening, there are new flowers. I have uploaded the picture here: http://www.flickr.com/photos/ycwee
It looks like a type of Kaempferia to me. Here's a site with a few: http://arboretum.sfasu.edu/gaylilies/kaempferia/index.htm
