This is not the Waterfall Lace Scarf by Lynn A. Davies, but is from the Acorn Street Shop Basics Collection and is designed by Karen Aho.

From their website (http://www.acornstreet.com/):
This graceful lace pattern has curving lines and bubbling eyelets, creating a cascading waterfall. The scarf can be knit with any yarn and any number of lace pattern repeats. Picture available here.