The aperture is oblong, entire, somewhat effuse at its base. The aperture is large, oblong-ovate, slightly effuse anteriorly. The aperture is irregularly ovate and somewhat effuse anteriorly. The outer lip is simple, thin, sharp, and slightly effuse towards the middle. The aperture is subovate, somewhat effuse anteriorly. It can effuse through solids like a gas, and dissolve materials like a liquid. Therefore, hydrogen molecules effuse four times faster than those of oxygen. The canal is short, wide, and effuse. The aperture is oval, and slightly effuse anteriorly. The aperture is pear-shaped, rather narrow posteriorily, and somewhat effuse anteriorly. The aperture is large, oval, effuse anteriorly. Common names include branched panic, hairy panic, effuse panic, native millet and poison panic. The aperture is very effuse, dilated outwardly and widely emarginated at its base. The outer lip is not effuse, columellar nearly straight, the sinus shallow, but well expressed.