Japan Flora: 1.   Annual; stems erect, elongate, stout, terete, soft, 4- 20 cm. long, 3.5-5 mm. thick, densely many-leaved; leaves subulate-linear, 1-nerved, 3-9 cm. long, 0.3 mm. wide; peduncles arising from the apex of the stem, 8-20 cm. long, slender, 6-ribbed; heads depressed-globose, 2-3 mm. long, 3-4 mm. across, bluish black, loosely puberulous; involucral bracts 7-9, hyaline, ovate or orbicular, 1 mm. long, blackish; re­ceptacle glabrous; flowers many, trimerous; floral bracts obo­vate-cuneate, acuminate, nearly as long as the flowers; stami­nate flowers 15 mm. long, with a spatheEke calyx deeply trilobate above and a tubular corolla; pistillate flowers 1 mm. long, pedicellate, the sepals 3 free, ovate-elliptic, rounded at apex, the petals 3, free, Hnear-oblaiKeolate，sparsely ci Hate, the stigmas 3, longer than the style.

Honshu (only in Tataranuma, Kozuke Prov.); very rare