Long flowering perennials of the allium family. Although all come from the much warmer climates of central and southern Africa they are quite at home in a sunny free draining soil. That said T. 'Silver Lace' is not hardy and must come inside for the winter. A much under-used genus and will soon repay a choice spot with a long flowering season. Clumps need dividing every few years, which is best done as growth commences in the spring.