Rhizomes short. Basal sheaths prominent, brown to dark brown, dull, not retaining dried leaf blades. Culms densely tufted, rigid and erect, subterete or upper part trigonous, 10-40 cm tall, 1-1.5 mm in diam. Leaves basal, erect, shorter than culms; blade filiform (tubular in section), 0.5-1 mm wide. Inflorescence spicate, brown or dark brown, broadly and densely cylindric, 1-2.5 × 0.3-0.4 cm; terminal spikelets male, lower ones bisexual; lowest involucral bract glumelike, apex aristate or not. Bisexual spikelets with a basal female flower and 2-4 distal male flowers. Glumes brown or dark brown, with pale midvein, oblong to ovate-oblong, 3.5-4.5 × 1.5-2.5 mm, obtuse, midvein narrow, margin narrowly hyaline or not. Prophylls pale colored to yellowish brown or occasionally brown, oblong-ovate, 2.1-3 × 1-1.4 mm, hyaline to very thinly membranous, usually without keels and veins, rarely obscurely keeled, margins free to base. Nutlets brown or dark brown, oblong or narrowly ovoid-oblong, flattened-trigonous, slightly shorter than prophylls, 1.5-2.5(-3) × 1-1.4 mm, very shortly stipitate, shortly beaked. Stigmas 3. Fl. and fr. May-Aug.
Home