Can. Roadside wattle (white horse bone): for the whole grass of the plant of the Rubiaceae family, that is, digging the roots in the fall, fresh or dried, into the liver meridian, spleen meridian, cool, slightly pungent, efficacy has expectoration of wind, diuresis, clearing heat, can treat rheumatism and lumbar and leg pain, dysentery, oedema, red eyes and swollen pains, and so on. Therefore, it can also be eaten in the fall.