Lepyrodia oligocolea B.G.Briggs & L.A.S.Johnson

Herb, dioecious, perennial, glabrous, forming diffuse patches or large tussocks. Rhizomes c. 5 mm diam. Cataphylls red-brown, scarious, extending to c. 6 cm up the culm. Culms spaced 0.7–1 cm apart, erect, slightly flattened, 25–100 cm long, 1.1–1.6 mm × 0.7–1.3 mm diam., smooth to slightly rugose, simple, with branched inflorescence; lowest internode long, lowest sheath mostly 5–16 cm above the cataphylls. Sheaths 2 or 3, persistent, 2.5–6 cm long, loose, lax or recurved, usually with inrolled margins, tan or blackish brown, upper cauline sheaths asperous, obtuse to truncate; lamina erect, to c. 5 mm long. Inflorescence 2–12 cm long; branches to 4 cm long, moderately crowded with flowers, basal inflorescence branch 10–15 mm below next upper branch, upper branches more clustered; spathes usually exceeding branches, 1.6–2.8 cm long; floral bracts 2, cuspidate. Male flowers: tepals rigid, yellow-brown, lanceolate; outer tepals longer, 2.9–4.4 mm long; inner tepals 2.5–3.4 mm long; filaments 1.7–2.5 mm long; anthers c. 2.0 mm long. Female flowers: tepals similar to males; outer tepals 2.8–3.5 mm long; inner tepals 2.8–3.0 mm long. Seeds ellipsoidal, c. 1.2 mm long, colliculate with small circular raised areas.

Wet sandy or gravelly soils over granite, in swamps and near creeks, often among shrubs.