Tall biennial or perennial herbs with narrow entire leaves and yellow or orange flowers. Lateral sepals saccate at the base. Pod elongated, roundish or 4-angled; seeds not winged, oblong, in one row. Europe, Asia, and North America. Name from Epvw, to draw blisters.

1, E. Peroffskianum. - This showy annual is a great favourite on account of its deep reddish orange-coloured blossoms and neat habit. From the Caucasus. E. asper, syn. E, Arkansanum, is similar to the last, but with lemon-coloured flowers. E. Marschallianum is another Caucasian species, with bright yellow flowers.