It grows as an erect annual or short-lived perennial herb, from ten to 50 centimetres high, with white flowers.

This is a short-lived annual herb producing several erect stem branches to heights rarely exceeding 15 centimeters.

Plants of this genus are annual, biennial, or short-lived perennial herbs.

It is a short-lived perennial herb producing a few-branched stem up to 1.2 to 1.5 meters in maximum height.

The plant is a short-lived perennial herb producing erect, fleshy stems from the top of its taproot.

It is an annual, biennial, or short-lived perennial herb.

It is an annual or short-lived perennial herb growing a hollow stem up to 70 centimeters tall.

E. minima is an annual or short-lived perennial herb growing up to 2 meters in maximum height from a deep taproot.

This is a short-lived perennial herb growing from an underground caudex.

This species is a biennial or short-lived perennial herb.