I bought this little treasure at Plantasia last week (the fundraising plant sale for the Charleston Horticultural Society). It was grown by Father Guerric at Mepkin Abbey in their native plant nursery. The label didn't offer much information:The succulent gray-green foliage forms a mound about 6-8" high.
And the sweet little flowers open in the evening and are closed by the next morning. They form at the tips of slender stalks that are about 12" high.
This is one of those great plants that we need to see more of in the nursery industry. It looks great in a container and would be easy to propagate.
Let me know if you know the species-