Clonal perennial; rhizome short but spreading, with sand-binding roots. Stems to 45 cm long, with many short lateral branches. Leaves: lamina 8–18 mm long, 1.0–1.2 mm wide, shortly hairy below, margin scabrous, apex acute with a pungent mucro 0.3–0.6 mm long; sheath surface and margin covered with branched trichomes. Bracts 14–15 mm long, 2.4–2.7 mm wide, papery, white with purple apex, hairy with short, unbranched hairs; outer bracts reddish brown; margin with branched trichomes; apex with vestigial leaf lamina 1.0–3.5 mm long, 1.0–1.2 mm wide. Perianth: tube 11.5–13.5 mm long, pilose in lower quarter with golden to silvery hairs, not prominently costate when dry; lobes 12–14 mm long, 2.6–3.0 mm wide, blue becoming red with age, pilose on abaxial side, apex acute; margins opaque; throat glabrous above sinus with short hairs inside. Staminal filaments 4.6–5.2 mm long. Anthers 6.2–6.6 mm long, 0.9–1.2 mm diam., yellow, not turning orange-red with age; pores terminal. Style 10.5–11.3 mm long, exceeding anthers. Seeds not seen.
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