This hat is named after Xanthoparmelia, a particularly pretty form of lichen, in homage to the Lichen and Lace yarn used to knit it! I'm not sure if this is one of the many types of lichen that can be used to dye yarn (see photos in my book Spin to Knit for some of the gorgeous purples you can get from lichen dyes), but it's definitely one you'll see often in the forests near me.
This is a printed copy of the pattern, professionally printed on glossy paper.
Alternately, you can buy digital patterns directly on Ravelry to have it placed in your library there. If this printed pattern is out of stock when you order, you may place a backorder and we'll ship as soon as new copies come in.