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
Idiosoma nigrum Idiosoma nigrum Idiosoma nigrum, also called Black rugose trapdoor spider, occurs only in south-western Australia, in dry woodlands east of the Darling Scarp and north to Moore River. Females can reach a length of about 30mm, males about 18mm. "I. nigrum" digs burrows up to 32 cm deep. The species name is derived from Latin "Niger" "black". The Black Rugose Trapdoor Spider is adapted for life in semi-arid habitats. They live in burrows up to 32 cm deep. These spiders construct an arrangement of leaves and twigs radiating out from the burrow entrance to serve as remote sensing device -