to perennial herbs, rarely subshrubs. Leaves simple, alternate, linear to
lanceolate, entire to crenate-serrulate, exstipulate or stipules replaced by
glands. Flowers bisexual in corymbose panicles or cymes. Calyx lobes 5, entire.
Corolla lobes 5, twisted, fugaceous. Stamens 5, united at base to form a ring,
often alternating with 5 minute staminodes, glands 2-3. Ovary 5-locular, ovules
10, 2 in each locule; styles 5, usually free; stigmas linear, clavate. Fruit a
capsule, septicidally splitting into 5-10 cocci. Seeds compressed, smooth.