Salvia yangii, commonly called Russian Sage, is a tough, drought-tolerant perennial known for its silvery foliage and hazy spikes of blue-violet flowers in summer, attracting pollinators and thriving in full sun with good drainage; it's a vigorous plant previously known as Perovskia atriplicifolia, valued for its airy texture in garden borders and its fragrance, though its crushed leaves aren't for eating.