Description
Key Characters:
Growth Form:
Annual or perennial herbs, sometimes woody at base, usually glandular pubescent.
Stems:
Roots:
Leaves:
Leaves simple.
Opposite and decussate (pairs of leaves alternating 90 degrees between nodes).
Surfaces finely scabrous.
Margins entire.
Sessile, subsessile, or petiolate.
Stipules minute or absent.
Flowers:
Flowers solitary in the leaf axils or in terminal spikes or racemes.
Calyx teeth 6, usually with small appendages alternating with the teeth, valvate, appearing as lobes on the floral tube.
Petals usually 6, alternate with the sepals, distinct, attached at summit of or within floral tube, crumbled in bud, sometimes absent, unequal, the dorsal pair usually larger; floral tube surrounding the ovary, sometimes subtended by an epicalyx of connate pairs of bracts.
Stamens 6–14, adnate to floral tube, 2 usually shorter; anthers dithecal, opening by longitudinal slits.
Ovary superior, 2–4(–6)-carpellate, with as many cells, at least at base, rarely 1-celled, placentation axile, rarely parietal when 1-celled; ovules 2 to numerous; ovules anatropous, ascending; style 1, filiform; stigma slightly 2-lobed.
Fruit:
Capsules membranous; ovoid or ellipsoid; loculicidally dehiscent laterally; the adjacent wall of the floral tube also splitting along its length and the placenta projecting laterally out of the capsules.
Seeds (1) to numerous per cell; ± winged; endosperm absent or very scanty.
Ploidy:
Habitat:
Elevation Range: