Lilium pardalinum, the panther lily, is a tall-growing North American species which reaches about 7' when well grown. It produces stems of whorled foliage in a pleasant shade of apple-green, topped of by up to about 20 flowers per stem. These are of the Turk's-cap shape (that is, with the petals reflexed back rather like a trout lily) in an attractive burnt orange (though this is somewhat variable) fading to a nice clear yellow in the centre. The whole flower is evenly spotted with quite large maroon spots.
Hardy zone 5-9
Sow seeds in cold frame and allow them to grow until bulbs are formed. Keep seedlings shaded the first year