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 malvaceum Ribes malvaceum Ribes malvaceum, the chaparral currant, is a member of the Grossulariaceae (gooseberry family). It is native to California and northern Baja California, where it occurs from sea level to , in chaparral, foothill oak woodland, and closed-cone pine forest habitats. "Ribes malvaceum" typically grows tall. This perennial shrub lacks the characteristic nodal spines which are demonstrated on the stems of many other members in the genus "Ribes". The leaf blades (20–50 mm) are densely hairy, glandular, and double toothed. Infloresences are 10-25 flowered and open, occurring October to April in native range. The hypanthium (5–8 mm) is pink