Sedum 'Black Jack' in the Southwest Garden "Section C: White Garden" SWGC#28.

"Black jack sedum was first introduced in 2005 by Walters Gardens Incorporated. The plant grows up to two feet tall and is compact with only an 18 to 24-inch spread. The plant has distinctive dark purplish-black leaves and clusters of bright pink flowers. The plant blooms in late summer and continues flowering into autumn. This late season flowering characteristic is how it came to be known by the common name autumn stonecrop." -https://garden.lovetoknow.com/black-jack-sedum