Taphrina pruni Taphrina pruni Taphrina pruni is a fungal plant pathogen of blackthorn (Prunus spinosa) that causes the Pocket or bladder Plum gall, a chemically induced distortion of the fruit (sloes), producing swollen on one side, otherwise deformed and flattened fruit gall without a stone. The twigs on infected plants may also be deformed with small strap-shaped leaves. "T. pruni" produces a distinctive tongue-like growth, similar to other closely related species such as "Taphrina alni" on Alder ("Alnus glutinosa") and "Taphrina padi" on Bird Cherry "Prunus padus". The growth is the distorted fruit and not a fungus in its entirety. "T. pruni"
Prunus maximowiczii leaves of "P. maximowiczii" are green; and those from the fruit, a dark grey to green. Chemically, amygdalin and prunasin, the derivatives of which produce prussic acid as well as Genistein can be extracted from "P. maximowiczii". Prunus maximowiczii Prunus maximowiczii, known as Korean cherry, Korean mountain cherry, or Miyama cherry, is a small (about 7.5 m), fruiting cherry tree that can be found growing wild in northeastern Asia and Eurasia. The species was first described in 1857 by Franz Josef Ruprecht. It was treated in the genus "Cerasus" (now generally accepted as a subgenus of "Prunus") by Vladimir Leontyevich