(O. formosanus?) Received from Heronswood many years ago as sp.,and still no closer to I.D.ing - we haven’t tried to, but life’s better with enigmas. In any event, a handsome plant with very long (to 12-15”), narrow foliage, and short spikes of white flowers in summer. Shade/pt shade, and good, woodsy soil. Slightly stoloniferous. Z7. Trade gallon