Malus tschonoskii moist, well-drained soil. It can grow to tall by broad in 20 years, with an ultimate height of . It is cultivated as an ornamental tree, for planting in gardens. Malus tschonoskii Malus tschonoskii (common names Chonosuki crab and pillar apple) is a species of flowering plant in the family Rosaceae, native to Japan. The specific epithet "tschonoskii" refers to the 19th century Japanese botanist Sugawa Tschonoski. "Malus tschonoskii" is a strong-growing deciduous tree, it has a distinctive columnar habit and is particularly noted for its autumn colouring, when the glossy mid-green leaves turn to brilliant shades of yellow, orange,
Étienne-Louis Malus Étienne-Louis Malus Étienne-Louis Malus (; ; 23 July 1775 – 24 February 1812) was a French officer, engineer, physicist, and mathematician. Malus was born in Paris, France. He participated in Napoleon's expedition into Egypt (1798 to 1801) and was a member of the mathematics section of the Institut d'Égypte. Malus became a member of the Académie des Sciences in 1810. In 1810 the Royal Society of London awarded him the Rumford Medal. His mathematical work was almost entirely concerned with the study of light. He studied geometric systems called "ray systems", closely connected to Julius Plücker's "line geometry". He conducted