Speciosum from Chile; it has tuberous roots, as have also such well-known perennials as T.
Frequently, as in many Dicotyledons, the primary root, the original root of the seedling, persists throughout the life of the plant, forming, as often in biennials, a thickened tap-root, as in carrot, or in perennials, a much-branched root system.
The perennials should be transplanted either every year or every second year.
Propagate perennials from root-slips and offsets.
Biennials and perennials should be sown before the middle of the month.