Japan Flora: Fleshy, densely soft-puberulent, green perennial herb; stems 10-30 cm. long, erect, terete, from ascending base, sparsely branched; leaves spreading, verticillate in 3’s to 5’s, slightly fleshy, elliptic, obovate or broadly elliptic, 1-2.5 cm. long, 7-15 mm. wide, entire, rounded to broadly obtuse, the petioles 3-8 mm. long; spike erect, short-pedunculate, 2-4 cm. long, rather densely many-flowered, glabrous except the peduncle; flowers minute, sessile; fruit globose, about 0.4 mm. long. 

Shi­koku, Kyushu (s. distr., Yakushima and Tanegashima)