Iris chrysographes, called the Black Knight, is found naturally in Europe. This Iris has dark and sumptuous flowers. The adult plant is about 50 cm tall. The flowers consist of 3 sepals and 3 petals. They are about 3 inches in diameter, black or dark brown and have dark purple markings. They are very fragrant. Flowers appear on tall stems. Plants bloom from spring to summer. The plant is self-fertile. Iris chrysographes develops narrow, sword-shaped greyish green leaves rising 1 foot tall or more. The plant spreads by means of its modified stems, rhizomes, which are located below the soil surface. Hardiness zones 4-9, (-32øC/-25øF, -5øC/25øF) in winter. It is less resistant to cold than other Iris. It requires full sun to light shade. In grown in pot, bring the plant inside in winter. In the wild, it grows in rocky spots or sunny fields. Iris chrysographes grows in fresh and humus soil. Requires partially moist soil; don?t overwater. It can grow in full sun or light shade. It loves a soil covered with organic matters.