spindle-shaped roots, and a stem from four to six feet in 
height. . 
It is rather difficult to cultivate in the open border on 
account of the large fleshy roots suffering in winter from 
excess of moisture, but it succeeds tolerably well if grown 
in pots during the winter, and kept nearly dry in a cold pit 
or frame. It grows freely in a light rich sandy loam, and 
flowers in May or June. 
It is only increased by seeds, and the plants are two or 
three years before they bloom. 
In potting or planting, one-third of the fleshy roots should 
be left above ground, otherwise they soon perish. 
