Jostaberry Jostaberry The jostaberry ("Ribes" × "nidigrolaria") is a complex-cross fruit bush in the genus "Ribes", involving three original species, the black currant "R. nigrum", the North American coastal black gooseberry "R. divaricatum", and the European gooseberry "R. uva-crispa". It is similar to "Ribes × culverwellii", the Jochelbeere, which is descended from just two of these species, "R. nigrum" and "R. uva-crispa". The cultivated plants are tetraploid. They are descended from two separate first-generation crosses, both of which produced very few fruit. Fertile tetraploids were produced using colchicine. The name "Jostaberry" was created via combining the German words for blackcurrant and
Ribes sericeum be over a centimeter (0.4 inch) long. The leaves are up to 4 centimeters (1.6 inches) long and are divided into several lobes with toothed edges. The leaves are hairy and glandular, especially on the undersides. The inflorescence is a solitary flower or a raceme of 2 or 3 flowers. Each flower has five reflexed green, red-tinged or red sepals around a tube-shaped ring of smaller whitish petals. The fruit is a purple berry up to 2.5 centimeters (1 inch) long which is covered in bristles. Ribes sericeum Ribes sericeum is a species of currant known by the common name