Here is a Yokuts shelter. From the diagram that the author provided, I had to ask if these were little Christmas trees made of thatch! She gave me an explanation, so hopefully the drawing will clear up any sort of confusion as to the nature of these little structures.  The book will be titled The Sierra Before History: Ancient Landscapes, Early Peoples. It is by Louise Jackson and will be out this spring. The book will be available locally at The Book Garden in Exeter, or through the publisher,  Mountain Press http://mountain-press.com/index.php , and other places that carry local writers.