Botanical name: Fimbristylis polytrichoides    Family: Cyperaceae (Sedge family)
Synonyms: Fimbristylis albescens, Fimbristylis subbulbosa, Scirpus polytrichoides

Rusty Sedge is a small, densely clustered annual or perennial herb, hairless. Stems are compressed, 5-30 cm high, up to 1 mm in diameter. Leaves are half as long to equaling stems, up to 1 mm wide; ligule a row of short hairs. Flower-heads are borne singly at branch-ends or pseudolateral spikelet, rarely with 1 or 2 extra spikelets on branches to 2 cm long; involucral bract sometimes glume-like, but often with an erect blade as long as or slightly exceeding inflorescence. Spikelets are erect, ovoid or oblong, round, pointed, 5-15 mm long, 2-3 mm in diameter. Glumes are spiral, membranous, more than twice as long as broad, blunt, muticous or mucronulate, slightly keeled, otherwise nerveless, 2.5-3 mm long, pale red-brown. Stamens 1 or 2; anthers 0.7–1 mm long. Style 2-fid, sparsely fringed with hairs above. Rusty Sedge is found in marshes, wet hollows, ditches on saline mud or sandy soil near to the coast, in Tropical & Subtropical Asia to N. & E. Australia and Madagascar and E. Africa.

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The flower labeled Rusty Sedge is ...