Isolepis crassiuscula Hook.f. APNI*
Synonyms: Scirpus crassiusculus (Hook.f.) Benth. APNI*
Description: Aquatic perennial, with culms leafy, submerged and elongated or creeping and rooting at nodes or erect and tufted (on 'dry' land).
Spikelet solitary, ovate to broad-elliptic in outline, slightly flattened, c. 15-flowered, 5–8 mm long; involucral bract shorter than to slightly exceeding spikelet, glume-like or with short thickened appendage.
Glumes obtuse, conspicuously numerous-nerved, 3–4 mm long, whitish or straw-coloured, often with orange-brown to dark red-brown dots or patches. Stamens 2 or 3; anthers 1.0–1.5 mm long. Style 2-fid.
Nut plano-convex, with well-defined margins, obovoid to ellipsoid, about half as long as glume, 1.5–2 mm long, 0.8–1.4 mm diam., smooth, minutely reticulate, shining, grey-brown.
Distribution and occurrence: Grows in high altitude to alpine swamps along the tablelands.
NSW subdivisions: NT, CT, ST
Other Australian states: Qld Vic. Tas.
These are coarser plants and with nerves more prominent on glumes than in I. producta and I. fluitans.. Occurs at higher altitudes than either of those species.
Text by K. L. Wilson
Taxon concept: Flora of NSW 4 (1993)
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