Lilium pensylvanicum

Lilium pensylvanicum, sometimes called the Siberian lily, is an Asian species of lily in the family Liliaceae. It is native to cold climates and needs winter frost. Wild plants occur in Siberia, the Russian Far East, Mongolia, northeast China, Korea and Hokkaido. Its Latin name is misleading, because of an error made by the botanist John Bellenden Ker. The plant reaches 30 to 70 centimetres in height and up to 25 centimetres in width, with a hard, smooth, straight stem and linear to lanceolate leaves. It flowers in June and July, bearing one to six upright, dish-shaped flowers whose six tepals curve backward from the centre, and its seeds ripen from August to September. The bulb is roundish and about 2 centimetres across. In Japan, where it is called ezosukashiyuri, it is abundant on the Notsuke Peninsula and is the emblem flower of Koshimizu on Hokkaido. It is easily grown, sensitive only to drought, and popular in European and American gardens.