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The redcurrant or red currant (Ribes rubrum) is a member of the genus Ribes in the gooseberry family. It is native to western Europe . [ 2 ] [ 3 ] [ 4 ] The species is widely cultivated and has escaped into the wild in many regions.
The characteristic leaf symptoms are a smaller number of leaf lobes and a decrease in the number of teeth on the serrated edge of the leaves. The flowers also show symptoms, with the buds being less hairy than normal and, in a severe form of the disease present in Russia and Scandinavia, the sepals appearing to be doubled in number to ten. [ 4 ]
Ribes (/ ˈ r aɪ b iː z /) [5] is a genus of about 200 known species of flowering plants, most of them native to the temperate regions of the Northern Hemisphere. [2] The species may be known as various kinds of currants, such as redcurrants, blackcurrants, and whitecurrants, or as gooseberries, and some are cultivated for their edible fruit or as ornamental plants.
Ribes triste, known as the northern redcurrant, [2] swamp redcurrant, or wild redcurrant, [3] is an Asian and North American shrub in the gooseberry family. Description [ edit ]
The flowers are produced in early spring at the same time as the leaves emerge, on dangling racemes 3–7 cm (1–3 in) long of 5–30 flowers; each flower is 5–10 millimetres (1 ⁄ 4 – 3 ⁄ 8 in) in diameter, with five red, pink, or white [6] petals. The fruit is a dark purple oval berry about 1 cm (3 ⁄ 8 in) long; it has an insipid ...
Signs of Cryptomyzus ribis are domed blisters on the leaves of, mainly red and white currant bushes. Soon after the leaves open in the spring, the galls are yellow and turn red by the early summer. Leaves can also be crinkled, with a colony of yellow-greenish aphids living in the hairy depressions on the underside of the leaves.
The leaves are 1.5–4 centimetres (1 ⁄ 2 – 1 + 1 ⁄ 2 in) long, [5] green, semi-leathery, [6] with 3 or 5 lobes; they turn red in autumn. [ 7 ] The plant blooms in spring with racemes of conspicuous golden yellow flowers, often with a pronounced, spicy fragrance similar to that of cloves or vanilla .
First flower buds (compact raceme) visible beside unfolded leaves 56: Beginning of raceme elongation 57: First flower bud separated on elongating raceme 59: Grape stage: all flower buds separated 6: Flowering 60: First flowers open 61: Beginning of flowering: about 10% of flowers open 65: Full flowering: at least 50% of flowers open, first ...