Description
Key Characters:
Growth Form:
Annual or perennial herbs, rarely subshrubs.
Stems:
Roots:
Leaves:
Leaves simple.
Leaves primarily basal, occasionally a few cauline.
Blades undifferentiated from petioles and apparently representing expanded petioles.
Stipules absent.
Flowers:
Flowers in spikes or heads, each flower subtended by a single bract, bracteoles absent.
Flowers bisexual (perfect) or unisexual, sessile or subsessile, protogynous.
Calyx of 4 sepals, the 2 next to the bract (anterior pair) often somewhat different than posterior pair, the lobes imbricate.
Corolla 4-lobed, salverform, scarious, the lobes imbricate, persistent in fruit, the tube covering the upper part of the capsule, the lobes reflexed, spreading, or erect and coherent.
Stamens 4, alternate with the corolla lobes; filaments adnate to the corolla tube; anthers long–exserted, dithecal, opening by longitudinal slits.
Ovary superior, 2-carpellate, with as many cells; ovule placentation axile; style 1, terminal, slender; stigmas protruding from buds.
Fruit:
Capsules circumscissile at or below the middle; enclosed in the persistent capsules.
Seeds with well-developed; firm; translucent endosperm.
Ploidy:
Habitat:
Elevation Range: