Cyperaceae taxon details
Tricostularia newbeyi R.L.Barrett & K.L.Wilson
1751743 (urn:lsid:marinespecies.org:taxname:1751743)
accepted
Species
recent only
Barrett, R. L.; Bruhl, J. J.; Wilson, K. L. (2021). Revision of generic concepts in Schoeneae subtribe Tricostulariinae (Cyperaceae) with a new genus <i>Ammothryon</i> and new species of <i>Tricostularia</i>. <em>Telopea.</em> 24: 61-169., available online at https://doi.org/10.7751/TELOPEA14844
page(s): 128 [details] Available for editors
[request]
page(s): 128 [details] Available for editors
[request]
Holotype PERTH
7456336, geounit Western Australia
7456336, geounit Western Australia
Holotype PERTH
7456336, geounit Western Australia [details]
7456336, geounit Western Australia [details]
Description Perennial tufted herb, 0.2–0.9 m high; plants clonal, forming dense tussocks 0.2–1 m across; rhizome thin, woody,...
Description Perennial tufted herb, 0.2–0.9 m high; plants clonal, forming dense tussocks 0.2–1 m across; rhizome thin, woody, short, branched, 1.5–2.5 mm diam., non- or slightly pseudobulbous; old leaf sheaths covering the rhizome, not breaking apart into fine fibres with age, pale brown; roots sand-binding. Stems slender, rigid, erect to spreading, often arcuate, with 1 (or 2) nodes, terete, very finely striate, 0.5–1.2 mm diam., smooth, glabrous, green to yellow-green, base not enlarged. Leaves mostly basal, numerous, and 1 (or 2) cauline; phyllotaxy loosely spirotristichous; sheath 15–25 mm long, 1.2–1.8 mm wide, slightly broader than the leaf lamina, margins with a few minute scabrid hairs, otherwise glabrous, straw-coloured to reddish brown, dull, upper margin membranous, oblique, finely scaberulous, ligule absent; cauline sheath tight around culm; pseudopetiole obscure or absent; basal leaves with a much reduced lamina, not exceeding the culms, lamina dorsiventral, 0.1–0.2 cm long, c. 0.05 mm wide; bases white-membranous, not dividing; lamina ± triangular, ± flat, not flexuous, old leaf tips not curling, finely multi-striate, margins finely scaberulous, otherwise glabrous when young, green, concolorous, weakly keeled along mid-nerve, margins ribbed and finely scaberulous, not recurved, apex acute; lowest leaves reduced to a sheath, lacking a lamina, pale brown. Inflorescence panicle-like, narrow, somewhat flexuous, with 6–9 nodes, 1.5–6 cm long, 5–8 mm wide, sometimes interrupted, axis green or yellow-green, not glaucous; bracts reduced leaf-like, not exceeding the spikelet clusters, sheaths open, not enveloping the higher bracts, gradually reducing along the inflorescence, basal bract much shorter than inflorescence, 7–13 mm long; branches erect, with (1–)2–4 fasciculate spikelets in 6–9 clusters, spikelets on short, compressed, glabrous peduncles 0.5–1.5 mm long, arising in each bract axil; cladoprophyll subtending each spikelet bract-like, sheath 3.0–4.0 mm long, pale brown to brown, with 3 distinct veins, partially enclosing the spikelet, with a slender lamina 0.7–1.0 mm long, brown. Spikelets pale brown to mid-brown, lanceolate, 4.4–5.6 mm long, terete, with 6 or 7 glumes, only topmost 2 fertile, the lower flower bisexual, female sterile, the upper flower bisexual, fertile, with a reduced glume above the florets to 2.3 mm long; glumes distichous, basal glume 2.9–3.4 mm long, fertile glumes 3.5–5.0 mm long, 1.1–1.6 mm wide, membranous, pale brown to mid-brown (apex often darker than body and keel paler yellow-brown), glabrous or finely ciliate on the keel and margins, lamina glabrous, ovate-lanceolate, acuminate, with a mucro to 0.8 mm long, keel distinct; rachilla compact and not or scarcely sinuous in fruiting spikelets. Perianth segments 6, whitish, minute, 0.5–1.1 mm long, expanded below, tapering to a fine point with a few stiff apical hairs. Stamens 3; anther connective 4.1–5.5 mm long, subulate; anthers yellow, c. 2.0 mm long, with a glabrous apical appendage up to 0.3 mm long. Style trifid, base 1.5–2.4 mm long, hispidulous and slightly flared in apical third, glabrous and not or scarcely dilated below, branches 1.3–1.6 mm long, hispidulous. Nutlet shortly stipitate, stipe c. 0.4 mm long, somewhat constricted, obovoid to broad ellipsoid, obscurely trigonous, dull, mid-brown, 1.8–2.0 mm long including the stipe and style base, 1.0–1.3 mm diam., faces smooth, puberulous especially near apex, epidermal cells square–hexagonal, inconspicuous, with three fine white ribs, style base slightly enlarged, thick, persistent, cap-like, c. 0.2 mm long; embryo not examined. Photosynthetic pathway not examined. 2n = unknown. [details]
Cyperaceae Working Group. (2025). [see How to cite]. Global Cyperaceae Database. Tricostularia newbeyi R.L.Barrett & K.L.Wilson. Accessed at: https://cyperaceae.org/aphia.php?p=taxdetails&id=1751743 on 2025-09-12
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2024-12-10 11:47:54Z
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Nomenclature
original description
Barrett, R. L.; Bruhl, J. J.; Wilson, K. L. (2021). Revision of generic concepts in Schoeneae subtribe Tricostulariinae (Cyperaceae) with a new genus <i>Ammothryon</i> and new species of <i>Tricostularia</i>. <em>Telopea.</em> 24: 61-169., available online at https://doi.org/10.7751/TELOPEA14844
page(s): 128 [details] Available for editors [request]
page(s): 128 [details] Available for editors
[request]
Present Inaccurate Introduced: alien Containing type locality
Holotype PERTH
7456336, geounit Western Australia [details]
7456336, geounit Western Australia [details]
From editor or global species database
Description Perennial tufted herb, 0.2–0.9 m high; plants clonal, forming dense tussocks 0.2–1 m across; rhizome thin, woody, short, branched, 1.5–2.5 mm diam., non- or slightly pseudobulbous; old leaf sheaths covering the rhizome, not breaking apart into fine fibres with age, pale brown; roots sand-binding. Stems slender, rigid, erect to spreading, often arcuate, with 1 (or 2) nodes, terete, very finely striate, 0.5–1.2 mm diam., smooth, glabrous, green to yellow-green, base not enlarged. Leaves mostly basal, numerous, and 1 (or 2) cauline; phyllotaxy loosely spirotristichous; sheath 15–25 mm long, 1.2–1.8 mm wide, slightly broader than the leaf lamina, margins with a few minute scabrid hairs, otherwise glabrous, straw-coloured to reddish brown, dull, upper margin membranous, oblique, finely scaberulous, ligule absent; cauline sheath tight around culm; pseudopetiole obscure or absent; basal leaves with a much reduced lamina, not exceeding the culms, lamina dorsiventral, 0.1–0.2 cm long, c. 0.05 mm wide; bases white-membranous, not dividing; lamina ± triangular, ± flat, not flexuous, old leaf tips not curling, finely multi-striate, margins finely scaberulous, otherwise glabrous when young, green, concolorous, weakly keeled along mid-nerve, margins ribbed and finely scaberulous, not recurved, apex acute; lowest leaves reduced to a sheath, lacking a lamina, pale brown. Inflorescence panicle-like, narrow, somewhat flexuous, with 6–9 nodes, 1.5–6 cm long, 5–8 mm wide, sometimes interrupted, axis green or yellow-green, not glaucous; bracts reduced leaf-like, not exceeding the spikelet clusters, sheaths open, not enveloping the higher bracts, gradually reducing along the inflorescence, basal bract much shorter than inflorescence, 7–13 mm long; branches erect, with (1–)2–4 fasciculate spikelets in 6–9 clusters, spikelets on short, compressed, glabrous peduncles 0.5–1.5 mm long, arising in each bract axil; cladoprophyll subtending each spikelet bract-like, sheath 3.0–4.0 mm long, pale brown to brown, with 3 distinct veins, partially enclosing the spikelet, with a slender lamina 0.7–1.0 mm long, brown. Spikelets pale brown to mid-brown, lanceolate, 4.4–5.6 mm long, terete, with 6 or 7 glumes, only topmost 2 fertile, the lower flower bisexual, female sterile, the upper flower bisexual, fertile, with a reduced glume above the florets to 2.3 mm long; glumes distichous, basal glume 2.9–3.4 mm long, fertile glumes 3.5–5.0 mm long, 1.1–1.6 mm wide, membranous, pale brown to mid-brown (apex often darker than body and keel paler yellow-brown), glabrous or finely ciliate on the keel and margins, lamina glabrous, ovate-lanceolate, acuminate, with a mucro to 0.8 mm long, keel distinct; rachilla compact and not or scarcely sinuous in fruiting spikelets. Perianth segments 6, whitish, minute, 0.5–1.1 mm long, expanded below, tapering to a fine point with a few stiff apical hairs. Stamens 3; anther connective 4.1–5.5 mm long, subulate; anthers yellow, c. 2.0 mm long, with a glabrous apical appendage up to 0.3 mm long. Style trifid, base 1.5–2.4 mm long, hispidulous and slightly flared in apical third, glabrous and not or scarcely dilated below, branches 1.3–1.6 mm long, hispidulous. Nutlet shortly stipitate, stipe c. 0.4 mm long, somewhat constricted, obovoid to broad ellipsoid, obscurely trigonous, dull, mid-brown, 1.8–2.0 mm long including the stipe and style base, 1.0–1.3 mm diam., faces smooth, puberulous especially near apex, epidermal cells square–hexagonal, inconspicuous, with three fine white ribs, style base slightly enlarged, thick, persistent, cap-like, c. 0.2 mm long; embryo not examined. Photosynthetic pathway not examined. 2n = unknown. [details]
