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Schoenus calostachyus (R.Br.) Roem. & Schult.
Family Cyperaceae
Schoenus calostachyus (R.Br.) Roem. & Schult. APNI*

Synonyms: Chaetospora calostachya R.Br. APNI*

Description: Tufted perennial.

Culms erect, rigid, ± terete, grooved, smooth, nodeless or 1-noded, 30–70 cm long, 1–2 mm diam.

Leaves with blade to 55 cm long; sheath red-brown to very dark red-brown, ± smooth, shining; mouth sparsely ciliolate; ligule present. Inflorescence erect, 12–50 cm long, with spikelets loosely clustered at 2–5 rather distant nodes; lowest involucral bract to 9 cm long. Spikelets narrow-ovate, acute, 3–6-flowered, 20–30 mm long. Glumes 9–12, lowest 4–7 empty, narrow-ovate, acute, mucronate, red-brown to blackish, ± dull, with margins ciliate; fertile glumes 15–20 mm long. Bristles 4–6, not plumose, shorter than nut. Stamens 3; anthers 8–9 mm long.

Nut trigonous, ellipsoid, 3-toothed at apex, 3.0–3.5 mm long, 1.5–1.7 mm diam., 3-ribbed, finely reticulate, glabrous, ± shining, dark brown to blackish.

Flowering: spring–summer.

Distribution and occurrence: Grows in coastal wet heath in sandy soils; only known from near Broadwater.
NSW subdivisions: NC
Other Australian states: Qld
AVH map***

Text by K. L. Wilson
Taxon concept: Flora of NSW 4 (1993)

APNI* Provides a link to the Australian Plant Name Index (hosted by the Australian National Botanic Gardens) for comprehensive bibliographic data
***The AVH map option provides a detailed interactive Australia wide distribution map drawn from collections held by all major Australian herbaria participating in the Australian Virtual Herbarium project.
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