It has a stout, somewhat reddish, erect stem, usually smooth, 50-150 cm tall, and branching near the top.

It has thickened roots and a smooth solitary stem measuring 16 cm long by 3 mm, which become thick at the base.

In one case, however, an atypical specimen was recovered with an almost completely smooth stem, free of striations or powder.

The smooth stem is erect or somewhat twining.

It has a smooth, slender stem that grows to a height of about 25 metres and with an average diameter of 300 mm.

The smooth stem is topped with a raceme inflorescence of one or nodding bell-shaped flowers.

In the purest sense, that of a smooth stem without leaves or branches, a scape is a single internode.

It is an annual herb producing a smooth, hairless, reddish stem up to about 45 centimeters tall.

The smooth stem is four-angled and may be simple or branching.

With a smooth stem the ends are threaded to allow connection to the plug and the actuator.