Glandular-hairy annual, up to 400 mm tall, with no taproot. Leaves opposite, obovate or oblong. Flowers in open cymes, petals white, shorter than sepals, shallowly notched. Fruit a cylindrical, papery capsule, ± twice as long as sepals, splitting into 10 lobes above.
Annual herb, 0.03-0.45 m high. Stems erect, slender. Leaves sessile; blade narrowly ovate. Flowers: style clothed with papillae all the way; corolla white. Fruit a membranous capsule, splitting into 10 short lobes above.
A herb. It is erect and slender and grows 40 cm tall. It grows each year from seed. The leaves are narrowly oval and without a stalk. The flowers are white. The fruit is a capsule that splits into 10 lobes.
Erect, slender annual herb, up to 400 mm tall. Leaves narrowly ovate, sessile. Style clothed with papillae all the way. Fruit a membranous capsule, splitting into 10 short lobes above. Flowers white.
Glandular-hairy annual to 40 cm. Leaves opposite, obovate or oblong. Flowers in open cymes, white, petals shorter than sepals, emarginate. Fruits elongating to twice as long as sepals.