Lace knitting pattern 738: ostrich feather and eyelet cable. Steps for 3-stitch eyelet cable with central YO (row 1) are illustrated below the chart. In words: of the next 3 stitches coming up on your left needle, lift the 3rd and pass it over the 2nd and the 1st; knit the 1st, YO, knit the 2nd. The psso would have a right slant. Yet in the photo the psso slants to the left. For that you would need to slip 1 as if to purl, k1, yo, k1, and pass slipped st over the 3 sts just worked.
A picture and two good charts for the beautiful Dayflower Lace Stitch and, as TsockTsarina says, “Except for the single WS decreases in rows Nr 5 and Nr this is actually just a pattern that reverses and repeats”.