Isolepis subtilissima Boeck.

Flora 41: 416 (1858) APNI

Taxonomic status:Accepted

Occurrence status:Present

Establishment means:Native

Small perennial with short filiform rhizome. Culms filiform, to 10 cm high. Leaves well-developed, blades to 9 cm long. Inflorescence sometimes proliferating. Spikelets 1–3, 2–5 mm long; involucral bract exceeding inflorescence, to 2 cm long; glumes usually obtuse, not mucronate, with several ill-defined nerves on sides, straw-coloured tinged dark red-brown to mostly dark red-brown, 0.8–1.3 mm long; stamen 1 (rarely 2 or 3 in lower flowers); anthers 0.2–0.5 mm long; style 3-fid. Nut ± unequally trigonous, with angles well-defined, obovoid to broad-ellipsoid, minutely roughened, glistening, pale yellow to pale red-brown, nearly as long as glume, 0.7–1.1 mm long, 0.5–0.7 mm diam. Flowers spring–summer.

DunT, EGL, EGU, GipP, Gold, GGr, HFE, HNF, HSF, MonT, NIS, OtP, SnM, VAlp, VRiv, WaP. Also Qld, NSW, ACT, Tas. Widespread in SE Asia and Australasia: Sabah, Papua New Guinea, New Zealand and the Philippines. Widespread in moist, often shaded sites from near sea-level (e.g. Mornington Peninsula) to margins of bogs and ephemeral pools in the alps.

This species is very close to Isolepis habra from which it differs in being generally more slender, with somewhat longer rhizome, usually solitary spikelet, shorter glumes, and more slender nut.

Source: Wilson, K.L. (1994). Cyperaceae. In: Walsh, N.G.; Entwisle, T.J. (eds), Flora of Victoria Vol. 2, Ferns and Allied Plants, Conifers and Monocotyledons. Inkata Press, Melbourne.
Updated by: Val Stajsic, 2017-11-14
Hero image
Distribution map
life Life
kingdom Plantae
phylum Tracheophyta
superorder Lilianae
order Poales
family Cyperaceae
genus Isolepis
Higher taxa


Source: AVH (2014). Australia's Virtual Herbarium, Council of Heads of Australasian Herbaria, <>. Find Isolepis subtilissima in AVH ; Victorian Biodiversity Atlas, © The State of Victoria, Department of Environment and Primary Industries (published Dec. 2014) Find Isolepis subtilissima in Victorian Biodiversity Atlas
  Bioregion Occurrence status Establishment means
Victorian Riverina present native
Gippsland Plain present native
Otway Plain present native
Warrnambool Plain present native
Goldfields present native
Greater Grampians present native
Dundas Tablelands present native
Northern Inland Slopes present native
East Gippsland Lowlands present native
East Gippsland Uplands present native
Highlands-Southern Fall present native
Highlands-Northern Fall present native
Monaro Tablelands present native
Highlands-Far East present native
Victorian Alps present native
Snowy Mountains present native

State distribution

Distribution map
South Australia
New South Wales
Australian Capital Territory