Cyperaceae taxon details
Tricostularia lepschii R.L.Barrett & K.L.Wilson
1751741 (urn:lsid:marinespecies.org:taxname:1751741)
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): 125 [details] Available for editors
[request]
page(s): 125 [details] Available for editors
[request]
Holotype PERTH
4121643, geounit Western Australia
4121643, geounit Western Australia
Holotype PERTH
4121643, geounit Western Australia [details]
4121643, geounit Western Australia [details]
Description Perennial tufted herb, 0.15–0.4 m high; plants clonal, forming spreading tussocks c. 0.1–0.2 m across, culms in tight...
Description Perennial tufted herb, 0.15–0.4 m high; plants clonal, forming spreading tussocks c. 0.1–0.2 m across, culms in tight clumps, distinctly spaced at c. 1 cm intervals; rhizome thin, woody, short, branched, 1–2.6 mm diam., non-pseudobulbous; old leaf sheaths covering the rhizome, sometimes breaking apart into fine fibres with age, pale brown; roots sand-binding. Culms slender, rigid, erect, not noded, terete, very finely striate, 0.6–0.8 mm diam., smooth, glabrous, bright light green to yellow-green, base not enlarged. Leaves all basal, few; phyllotaxy loosely spirotristichous; sheath 14–59 mm long, 0.8–1.0 mm wide, slightly broader than the leaf lamina, margins glabrous, straw-coloured to pale brown, dull, upper margin membranous, oblique, glabrous or very finely ciliate, ligule absent; cauline sheath tight around culm; pseudopetiole obscure to distinct, semi-terete, up to 2.5 mm long; basal leaves with a much reduced lamina, not exceeding the culms, lamina dorsiventral, 0.25–0.35 cm long, 0.25–0.35 mm wide; bases white-membranous below pseudopetiole, not dividing; lamina ± linear, ± flat to slightly channelled, ± flexuous, old leaf tips not curling, finely multi-striate, margins finely scabrid, otherwise glabrous when young, green, concolorous, not keeled along mid-nerve, nerves obscure, margins not ribbed, finely scabrous, not recurved, apex long-attenuate, ± acute; lowest leaves reduced to a sheath, lacking a lamina, pale brown. Inflorescence very contracted panicle-like, subcapitate, with 1 or 2(?3) nodes, but very compact so nodes obscured by spikelets, 0.7–1.1 cm long, 4–8 mm wide, not interrupted, axis green or yellow-green, not glaucous; bracts reduced leaf-like, shorter than or equal to the spikelet clusters, sheaths open, not or somewhat enveloping the higher bracts, gradually reducing along the inflorescence, basal bract ± equal to inflorescence, 6–8 mm long; branches erect, with 2–4 spikelets in a terminal cluster, spikelets sub-fasciculate, on short, terete, glabrous peduncles 0.5–1 mm long, arising in each bract axil; cladoprophyll subtending each spikelet bract-like, sheath 3.1–3.6 mm long, brown, with a distinct midrib, partially enclosing the spikelet, with a slender lamina 0.9–1.2 mm long, brown. Spikelets brown, lanceolate, 4–6 mm long, compressed, with 6 glumes, only topmost 2 fertile, both bisexual, fertile, or the lower flower male, fertile, no reduced glume above the florets; glumes ± distichous, basal glume 1.5–3.0 mm long, fertile glumes 4.0–4.5 mm long, 1.0–1.1 mm wide, membranous, red-brown to dark red-brown, sparsely and finely scabrous on the keel, lamina glabrous, ovate-lanceolate, acute to acuminate, with a mucro to 0.6 mm long, keel distinct; rachilla compact and not or scarcely sinuous in fruiting spikelets, but the two fertile flowers presented beside each-other, so rachilla appearing flared at the apex. Perianth segments 6, whitish, minute, 0.4–1.1 mm long, compressed to ± filiform, expanded below, tapering to a fine point with a few apical hairs. Stamens 3; anther connective [not seen mature]; anthers 1.5–2.2 mm long, with a glabrous apical appendage up to 0.3 mm long. Style [not seen]. Nutlet shortly stipitate, stipe c. 0.3 mm long, scarcely constricted, broad ellipsoid, obscurely trigonous, dull, mid-brown, c. 2.0 mm long including the stipe and style base, c. 1.3 mm diam., faces smooth, finely puberulous, epidermal cells square–hexagonal, inconspicuous, with three fine white ribs, style base not enlarged; embryo not examined. Photosynthetic pathway not examined. 2n = unknown. [details]
Cyperaceae Working Group. (2025). [see How to cite]. Global Cyperaceae Database. Tricostularia lepschii R.L.Barrett & K.L.Wilson. Accessed at: https://cyperaceae.org/aphia.php?p=taxdetails&id=1751741 on 2025-09-12
Date
action
by
2024-12-10 11:47:54Z
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The webpage text is licensed under a Creative Commons
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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): 125 [details] Available for editors [request]
page(s): 125 [details] Available for editors
[request]
Present Inaccurate Introduced: alien Containing type locality
Holotype PERTH
4121643, geounit Western Australia [details]
4121643, geounit Western Australia [details]
From editor or global species database
Description Perennial tufted herb, 0.15–0.4 m high; plants clonal, forming spreading tussocks c. 0.1–0.2 m across, culms in tight clumps, distinctly spaced at c. 1 cm intervals; rhizome thin, woody, short, branched, 1–2.6 mm diam., non-pseudobulbous; old leaf sheaths covering the rhizome, sometimes breaking apart into fine fibres with age, pale brown; roots sand-binding. Culms slender, rigid, erect, not noded, terete, very finely striate, 0.6–0.8 mm diam., smooth, glabrous, bright light green to yellow-green, base not enlarged. Leaves all basal, few; phyllotaxy loosely spirotristichous; sheath 14–59 mm long, 0.8–1.0 mm wide, slightly broader than the leaf lamina, margins glabrous, straw-coloured to pale brown, dull, upper margin membranous, oblique, glabrous or very finely ciliate, ligule absent; cauline sheath tight around culm; pseudopetiole obscure to distinct, semi-terete, up to 2.5 mm long; basal leaves with a much reduced lamina, not exceeding the culms, lamina dorsiventral, 0.25–0.35 cm long, 0.25–0.35 mm wide; bases white-membranous below pseudopetiole, not dividing; lamina ± linear, ± flat to slightly channelled, ± flexuous, old leaf tips not curling, finely multi-striate, margins finely scabrid, otherwise glabrous when young, green, concolorous, not keeled along mid-nerve, nerves obscure, margins not ribbed, finely scabrous, not recurved, apex long-attenuate, ± acute; lowest leaves reduced to a sheath, lacking a lamina, pale brown. Inflorescence very contracted panicle-like, subcapitate, with 1 or 2(?3) nodes, but very compact so nodes obscured by spikelets, 0.7–1.1 cm long, 4–8 mm wide, not interrupted, axis green or yellow-green, not glaucous; bracts reduced leaf-like, shorter than or equal to the spikelet clusters, sheaths open, not or somewhat enveloping the higher bracts, gradually reducing along the inflorescence, basal bract ± equal to inflorescence, 6–8 mm long; branches erect, with 2–4 spikelets in a terminal cluster, spikelets sub-fasciculate, on short, terete, glabrous peduncles 0.5–1 mm long, arising in each bract axil; cladoprophyll subtending each spikelet bract-like, sheath 3.1–3.6 mm long, brown, with a distinct midrib, partially enclosing the spikelet, with a slender lamina 0.9–1.2 mm long, brown. Spikelets brown, lanceolate, 4–6 mm long, compressed, with 6 glumes, only topmost 2 fertile, both bisexual, fertile, or the lower flower male, fertile, no reduced glume above the florets; glumes ± distichous, basal glume 1.5–3.0 mm long, fertile glumes 4.0–4.5 mm long, 1.0–1.1 mm wide, membranous, red-brown to dark red-brown, sparsely and finely scabrous on the keel, lamina glabrous, ovate-lanceolate, acute to acuminate, with a mucro to 0.6 mm long, keel distinct; rachilla compact and not or scarcely sinuous in fruiting spikelets, but the two fertile flowers presented beside each-other, so rachilla appearing flared at the apex. Perianth segments 6, whitish, minute, 0.4–1.1 mm long, compressed to ± filiform, expanded below, tapering to a fine point with a few apical hairs. Stamens 3; anther connective [not seen mature]; anthers 1.5–2.2 mm long, with a glabrous apical appendage up to 0.3 mm long. Style [not seen]. Nutlet shortly stipitate, stipe c. 0.3 mm long, scarcely constricted, broad ellipsoid, obscurely trigonous, dull, mid-brown, c. 2.0 mm long including the stipe and style base, c. 1.3 mm diam., faces smooth, finely puberulous, epidermal cells square–hexagonal, inconspicuous, with three fine white ribs, style base not enlarged; embryo not examined. Photosynthetic pathway not examined. 2n = unknown. [details]
