Acorus gramineus 'Variegatus' (Slender Sweet Flag)
A moisture loving grass with a compact, tufted habit and semi-evergreen strap-like leaves with a creamy yellow edge. Height & Spread 50cm (1.5ft).
Ophiopogon planiscapus 'Nigrescens' (Black Mondo)
An evergreen perennial with tufts of strap-like black leaves. Small purple flowers are followed by glossy, black berries. Height & Spread 50cm (1.5ft).