Acorus gramineus 'Ogon'
Acorus gramineus 'Ogon' (Yellow-leaved Calamus) - Grass-like perennial with thin iris-like foliage that has a rich yellow variegation. Grows to 6-12 inches tall and spreads slowly by rhizomes. Tiny, insignificant, yellow-green flowers bloom from spring to early summer on lateral, sedge-like flower spikes but are hardly noticeable. Plant in full sun to light shade in soil that is moist or regularly irrigated. In a pond the water depth should be right at the soil line or up to 2 to 4 inches above crown. Hardy to USDA Zone 5 (-10°F). The rich yellow foliage distinguishes this plant from the cultivar 'Variegatus', which is green with thin cream stripes, often along one leaf margin. Useful massed or as an accent; use to light up a dark area of the pond and is a particularly nice plant in as a pot or tub subject or used as a small scale groundcover.