Acorus
A grasslike, clumping perennial grown chiefly for its upright, fan-shaped foliage, typically reaching 6 inches to 2 feet depending on species and selection. It prefers part shade to full sun and consistently moist to wet soils, performing well at pond and stream margins, in rain gardens, and in boggy ground where many plants fail. The semi-evergreen blades may be solid green or variegated with cream and gold, and the foliage is pleasantly aromatic when brushed or cut. Use it for water-feature edging, moist borders, mass groundcover in damp shade, and accent texture among broadleaf plantings.