Small woody, sericeous, aromatic shrub-lets (chamaephytes) 15-30 cm high, with a long thick woody taproot and gnarled basal stems covered with thick corky bark, producing anÂnual shoots. Leaves subsessile, stipules reduced to 1-2 pairs of minute, subulate glands, lamina narrowly ovate, 2-5 cm long, 7-14 mm broad, apex acute to obtuse, base cuneate, margin serrate, with 1-2 pairs of sessile circular glands irregularly placed on lower surface near margin, densely pubescent with coarse simple hairs. Flowers axillary, solitary, opening in the mornÂing, fading at night, on short to long pedicels which become pendulous in fruit, with a pair of minute bracts. Sepals fused in lower third forming a cup, free above, narrowly ovate-acuminate, apiculate, c. 12 mm long, 3 mm broad, thin, dorsally somewhat hairy, 3-nerved, deciduous. Petals about as long as sepals, yellow, narrowly obovate, clawed, fused to the sepaloid cup below, alternating with the sepals and together producing a small erect, annular fringe at the mouth of the cup, deciduous. Stamens 5, free, hypogynous, filaments subÂulate, glabrous, long or short, anthers versatile, introrse. Ovary
