Japan Flora: Closely resembling No. 8 in habit, but differing in the more numerous sterile leaves of the upper plane, more rounded at base, the keeled bracts dimorphic, strongly differing from the leaves on the fertile branches, and the more numerous somewhat flattened spikes; leaves of lower plane on branches and stems ovate, 2-3 mm. long, ob- tusish to acute, oblique at base, white-margined, those of upper plane narrowly deltoid-ovate, rounded at base, nearly equilateral; spikes 7-25 mm. long, 1.5-3 mm. wide, dorsiventral, the brace of two forms, many, dense, the longer ones deltoid- lanceolate, ciliolate, acuminate, keeled, the smaller ones slightly keeled. July-Oct.

Honshu (Izu Isis., Kinki Distr. and westw.), Shikoku, Kyushu. Ryukyus, Formosa, China, and Indochina.