Blackcurrant can damage both unopened and open flowers when the temperature falls below . The flowers at the base of the strig are more protected by the foliage and are less likely to be damaged. In midsummer the strigs of green fruit ripen to edible berries, very dark purple in colour, almost black, with glossy skins and persistent calyxes at the apex, each containing many seeds. An established bush can produce about 4.5 kilograms (10 pounds) of fruit each year. Plants from Northern Asia are sometimes distinguished as a separate variety, "Ribes nigrum" var. "sibiricum", of which "Ribes cyathiforme" is considered
Rheum ribes 3-0-rutinoside were isolated from the shoots of Syrian rhubarb. "Rheum ribes" is main food plant of a hairstreak butterfly (Rhubarb Hairstreak "Callophrys mystaphia"; Turkish name: "ışgınzümrütü" [lit. 'Rhubarb Emerald']) in Iğdır, Van, Hakkâri, Kars, and Siirt provinces in eastern Turkey. "Rheum ribes" leaves is food plant of Xylena exsoleta moth in Van Province, Turkey. Rheum ribes Rheum ribes, the Syrian rhubarb or currant-fruited rhubarb, rhubarb-currant, warted-leaved rhubarb, warty-leaved rhubarb, rhubarb of Babilonia is an edible wild rhubarb species in the genus "Rheum". It grows between 1000 and 4000 m on dunite rocks, among stones and slopes, and is distributed in