Mentha pulegium. Perennial herb. Lilac flowers and wild mint scented foliage. Said to repel mice, flies and fleas. NOT TO BE INGESTED BY PREGNANT WOMEN! Good in rock gardens, borders, and as ground cover. Grows 4-8" tall by 18" wide. Blooms in summer. Full sun to partial shade. Plant in rich, moist, humusy soil. Zone 5.