Pedaliaceae: Gamopetalae

Herbs with opposite leaves, and mucilage containing glandular hairs; flowers zygomorphic, hoypogynous; calyx and corolla 5, fused, corolla bilabiate; stemens 4, epipetalous, sometimes 2; carpels 2, syncarpous, 4-loculed or incompletely 4-loculed, axile placentation; fruit a capsule, beaked or barbed.