A deciduous, sometimes evergreen, half-woody, shrub-like plant (intermediate between a shrub and a herbaceous perennial) with young stems that are soft, hollow and upright in various shades of green, salmon pink, maroon and purple,  in height, which may only last for 2–5 years before collapsing and being replaced by new stems from the roots.
A plant with a mix of deciduous and evergreen characteristics, featuring semi-woody stems that are soft and hollow, growing upright in various colors such as green, pink, maroon, and purple. These stems typically last 2–5 years before collapsing and being replaced by new growth from the roots.