Probably perennial, at least with the lower parts of the stems more or less woody; stems up to 2.2 dm. long, densely leafy, with hirsute internodes.. Cauline leaves opposite or whorled, aggregated in axillary branches, narrowly linear, acute, mucronate, 3–11 mm. long, 0.25 mm. broad, spreading, glabrous or nearly glabrous.. Inflorescences terminal, many flowered, more or less congested, 2–4.7 cm. broad.. Flowers apparently white.. Sepals lanceolate, acute or shortly acuminate, 3 mm. long, glabrous.. Petals narrowly lanceolate, acute or irregularly 2–3-dentate, 2.3 mm. long.. Stamens 5, 2 mm. long.. Ovary with 10–12 ovules; style slender, about 1.5 mm. long.