Phlox alyssifolia subsp. abdita

This rare subspecies of alyssum-leaved phlox is a compact, cushion-forming perennial native to the grasslands and rocky outcrops of South Dakota. It prefers well-drained to gritty soils and partial shade, with moderate watering during the growing season. Best suited for collectors and native plant enthusiasts; it is rarely available commercially but rewards careful cultivation with delicate spring blooms.