Cardiocrinum cordatum var. glehnii is a Japanese version of the Himalayan Cardiocrinum giganteum, except much hardier (fine in Ontario, Canada). Cardiocrinum cordatum v. glehnii makes a green skunk cabbage-like rosette for three years before producing a 6' tall flowering stalk lined with tubular, lightly fragrant, green flowers. After flowering, the bulb divides into small pieces and starts the four-year process over again. Slightly moist, but well-drained soils are best. Cardiocrinum cordatum var. glehnii has thrived for us despite some of our hottest summers on record. Planting these is a cardio workout that even I could enjoy.