The stem of the bream is usually straight, bare, or slightly pubescent with spiny hairs,
less often Branchy.
After the Decembrist has fully bloomed, pinch the shoots a little,
this will stimulate the growth of new Branchy shoots.
The plant reaches a height of up to 170 cm, has an erect,
often Branchy, weakly pellied stem,
which can be both naked and have a fringe of glandular hairs.