Black Panther. Saunders. 1948. F1 lutea hybrid. Black Panther has very dark ‘black-red’ flowers that are semi-double in form. Petals are frilled and ruffled and have a shiny sheen. The deeply colored flowers have an attractive mass of yellow waxy anthers that contrast. Plants are very upright growers and are taller than wide. Height is to 4 feet in Wisconsin and have better than average stem hardiness for a lutea hybrid. This is not a heavy blooming plant, but is reliable each year. Foliage is narrow and irregular. Always in high demand and rare. No fertility. Ships in late September to mid October.