Malus sieversii modern apple cultivars. Unlike domesticated varieties its leaves go red in autumn: 62.2% of the trees in the wild do this compared to only 2.8% of the regular apple plant or the 2,170 English cultivated varieties. The species is now considered vulnerable to extinction. "Malus sieversii" has previously been identified as the main contributor to the genome of the cultivated apple ("Malus pumila"), on the basis of morphological, molecular, and historical evidence. A DNA analysis in 2010 confirmed "M. sieversii" as the progenitor of the cultivated apple. A third species that has been thought to have made contributions to the
Karl Malus curing McDowell, Malus also experimented on him using the Fly's DNA, which would later cause McDowell to transform into the villainous Hornet. Malus went to prison, but was released in order to "help" authorities against the threat of the Hornet. In actuality, he wanted to capture and study Spider-Woman. Malus slipped away, and made contact with the Hornet, whom he kept drugged and aggressive for his own purposes. Malus then contacted Jack Russell, a man cursed with lycanthropy, and told him he could help cure his transformations into a werewolf. Instead, he placed a control collar on Russell and sent