This is 'Gent' from Adelheid Dangela's book Occhi-Patchwork and More. I really like the shape.
I've mentioned before that I find it irritating when a center rosette ends with a split ring to climb out to the next round, resulting in one of the rings pointing the opposite way from the others (I worked the one above in two rounds instead of climbing out). And I wondered what would happen visually if ALL of the rings of the rosette were flipped the other way. I tried experimenting on this motif.
Upper left: The original, no split ring (larger image at top of post).
Upper right: Original, climbing out with a split ring (the split ring is at the top - at 12'o clock).
Lower right: First experiment. Since the center rings are all 5-5-5-5, I tried 5-3-4-3-5; the space in the center of the rosette is too large, but the rings are pleasingly round.
Lower left: Second experiment. I used 7-3-2-3-7, to make the center rosette smaller and the free end larger. Much closer, visually, to the original even though the rings are still slightly larger. I'm pleased with how it came out and may try this on other snowflakes. However, with a zoomed out view to see all four of them, I'm realizing that perhaps I am being needlessly picky and it doesn't matter so much that one of the rings is slightly different when climbing out. After all, working the rosette separately results in a small irregularity where I tie the ends (perhaps I should be working on my finishing instead. ;)
As someone who collects snowflake patters, I liked Adelgeid's first book, Occhi-Patchwork, more than Occhi-Patchwork and More, as it had more large hexagon "snowflake" motifs. This pattern is the only large hexagon from this book; the others are smaller hexagons, triangles, diamonds, etc. to be joined together into larger mats (some of which are quite impressive). Her books are nicely put together, with diagram patterns and colorful illustrations of the motifs in larger mats.