Tim, your Sternbergia seems early, but a gorgeous patch.
Tony, sometimes plants are just plain wonderful and weird, and Biarum certainly qualifies. Your plant just "squeaked in" to be a summer bloomer, as this response 2 days later marks the first day of autumn. I tried growing some Biarum species from Mike Salmon seed a number of times but never succeeded; I wonder if it has more to do with keeping plants dry versus an issue with winter hardiness. While these are quantifiably weird plants, I do like them and some day hope to grow a few (outdoors) successfully.
Massachusetts, USA, near the New Hampshire border USDA Zone 5
antennaria at aol.com
I keep mine totally dry in summer and start to water hen I see growth in the early autumn. Cold is not a problem as I have found most very hardy. This particular one is covered in snow all winter.
Some of the lowland ones like davisii are probably tender.