Shrub, stems round or square, up to 2m. Leaves: Opposite, oval, with an acute tip and serrated margins. Flowers: Mauve, in whorls on an erect spike, with long protruding stamens. Fruit: Pale brown nutlets. Flowering period: July to November. Habitat: Common on the Dhofar escarpment, often under Anogeissusdhofaricatrees. Altitude: 200-900m. Uses: This plant flourishes during the monsoon rains in the mountains and has many medicinal uses. Note: Endemic to Dhofar and southeast Yemen.