Ribes sanguineum 'White Icicle'
(Red flowering currant, Winter currant)
This is considered one of the best white flowering currants, bearing long-lasting, pendent racemes of pungently spicy, pure-white blooms. Its yellow autumn leaves fall to expose mahogany stems in winter, which later make a striking contrast to chartreuse flower buds in spring. It grows to about 10 feet high and wide.