Malus floribunda has resistance to the apple scab and founded the program to introduce this "VF gene" into cultivated apples. Their work had been progressing with great success. This crabapple species is considered as one of the best crabapples for form and flower and has gained the Royal Horticultural Society's Award of Garden Merit. Malus floribunda Malus floribunda, common name Japanese flowering crabapple, Japanese crab, purple chokeberry, or showy crabapple, originates from Japan and East Asia. It may be a wild species, or a hybrid of "M. sieboldii" x "M. baccata". "Malus floribunda" forms a round-headed, small deciduous tree with narrow leaves
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