Cyperaceae taxon details
Tricostularia bennettiana R.L.Barrett & K.L.Wilson
1751734 (urn:lsid:marinespecies.org:taxname:1751734)
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): 115 [details] Available for editors
[request]
page(s): 115 [details] Available for editors
[request]
Description Perennial tufted herb, 0.15–0.3 m high; plants clonal, forming dense tussocks 0.1–0.3 m across; rhizome thin, woody,...
Description Perennial tufted herb, 0.15–0.3 m high; plants clonal, forming dense tussocks 0.1–0.3 m across; rhizome thin, woody, short, branched, 1–1.5 mm diam., non-pseudobulbous; old leaf sheaths covering the rhizome, not breaking apart into fine fibres with age, pale brown; roots sand-binding. Stems slender, rigid, erect, with 1 node, terete, very finely striate, 0.6–1.1 mm diam., smooth, glabrous, green to yellow-green, base not enlarged. Leaves mostly basal, numerous, and 1 cauline; phyllotaxy loosely spirotristichous; sheath 16–28 mm long, 1.0–1.4 mm wide, slightly broader than the leaf lamina, margins very finely scabrid, otherwise glabrous, red-brown, dull, upper margin membranous, oblique, finely ciliate, ligule absent; cauline sheath tight around culm; pseudopetiole obscure or absent; basal leaves with a much reduced lamina, not exceeding the culms, lamina dorsiventral, 0.1–0.3 cm long, c. 0.05 mm wide; bases white-membranous, not dividing; lamina ± linear, ± flat, ± flexuous, old leaf tips not curling, finely multi-striate, margins very finely scabrid, otherwise glabrous when young, green, concolorous, weakly keeled along mid-nerve, margins ribbed and finely scabrous, not recurved, apex long-attenuate; lowest leaves reduced to a sheath, lacking a lamina, pale to reddish brown. Inflorescence contracted, panicle-like, narrow, shortly elongate, somewhat flexuous, with 2–4 nodes, 1.5–3.5 cm long, 5–8 mm wide, sometimes interrupted, axis green or yellow-green, not glaucous; bracts reduced leaf-like, with 3 distinct veins, exceeding the spikelet clusters, sheaths open, partly enveloping the higher bracts, gradually reducing along the inflorescence, basal bract much shorter than inflorescence, to 9 mm long; branches erect, with 1–3 spikelets in a terminal cluster (sometimes with a second distant cluster), spikelet(s) on short, terete, glabrous peduncles 0.5–1 mm long, arising in each bract axil; cladoprophyll subtending each spikelet bract-like, sheath 3.2–3.5 mm long, brown, with a distinct midrib, partially enclosing the spikelet, with a slender lamina 1.8–3.0 mm long, reddish brown. Spikelets reddish brown, lanceolate, 4–6 mm long, ± terete to somewhat compressed, with 5 or 6 glumes, only topmost 2 fertile, both bisexual, fertile, no reduced glume above the florets; glumes distichous, basal glume 2.2–2.7 mm long, fertile glumes 3.7–4.9(–5.6) mm long, 1.3–1.6 mm wide, membranous, pale red-brown to dark red-brown sparsely scabrous on the keel and margins, lamina glabrous, ovate-lanceolate, acuminate, with a mucro to 0.7 mm long, keel distinct; rachilla shortly elongate and not or scarcely sinuous in fruiting spikelets. Perianth segments 6, whitish, minute, 0.6–1.0 mm long, expanded below, filiform above, with a few stiff apical hairs. Stamens 3; anther connective 3.4–4.3 mm long, subulate; anthers cream, 2.6–3.0 mm long, with a glabrous apical appendage up to 0.5 mm long. Style trifid, base 3.1–4.3 mm long, glabrous and slender below, hairy and dilated in apical third, branches 2.1–2.8 mm long, hispidulous. Nutlet shortly stipitate, stipe c. 0.3 mm long, very constricted, obovoid to obpyriform, obscurely trigonous, dull, mid-brown to dark brown, 1.2–1.5 mm long including the stipe and style base, 0.8–0.9 mm diam., faces smooth, puberulous especially near apex, epidermal cells square–hexagonal, inconspicuous, with three fine white ribs, style base only slightly enlarged, thick, persistent, very shortly conical, c. 0.2 mm long; embryo not examined. Photosynthetic pathway inferred from anatomy to be C3 (Takeda et al. 1985; Orchard 1531). 2n = unknown. [details]
Cyperaceae Working Group. (2025). [see How to cite]. Global Cyperaceae Database. Tricostularia bennettiana R.L.Barrett & K.L.Wilson. Accessed at: https://cyperaceae.org/aphia.php?p=taxdetails&id=1751734 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): 115 [details] Available for editors [request]
page(s): 115 [details] Available for editors
[request]
Present Inaccurate Introduced: alien Containing type locality
From editor or global species database
Description Perennial tufted herb, 0.15–0.3 m high; plants clonal, forming dense tussocks 0.1–0.3 m across; rhizome thin, woody, short, branched, 1–1.5 mm diam., non-pseudobulbous; old leaf sheaths covering the rhizome, not breaking apart into fine fibres with age, pale brown; roots sand-binding. Stems slender, rigid, erect, with 1 node, terete, very finely striate, 0.6–1.1 mm diam., smooth, glabrous, green to yellow-green, base not enlarged. Leaves mostly basal, numerous, and 1 cauline; phyllotaxy loosely spirotristichous; sheath 16–28 mm long, 1.0–1.4 mm wide, slightly broader than the leaf lamina, margins very finely scabrid, otherwise glabrous, red-brown, dull, upper margin membranous, oblique, finely ciliate, ligule absent; cauline sheath tight around culm; pseudopetiole obscure or absent; basal leaves with a much reduced lamina, not exceeding the culms, lamina dorsiventral, 0.1–0.3 cm long, c. 0.05 mm wide; bases white-membranous, not dividing; lamina ± linear, ± flat, ± flexuous, old leaf tips not curling, finely multi-striate, margins very finely scabrid, otherwise glabrous when young, green, concolorous, weakly keeled along mid-nerve, margins ribbed and finely scabrous, not recurved, apex long-attenuate; lowest leaves reduced to a sheath, lacking a lamina, pale to reddish brown. Inflorescence contracted, panicle-like, narrow, shortly elongate, somewhat flexuous, with 2–4 nodes, 1.5–3.5 cm long, 5–8 mm wide, sometimes interrupted, axis green or yellow-green, not glaucous; bracts reduced leaf-like, with 3 distinct veins, exceeding the spikelet clusters, sheaths open, partly enveloping the higher bracts, gradually reducing along the inflorescence, basal bract much shorter than inflorescence, to 9 mm long; branches erect, with 1–3 spikelets in a terminal cluster (sometimes with a second distant cluster), spikelet(s) on short, terete, glabrous peduncles 0.5–1 mm long, arising in each bract axil; cladoprophyll subtending each spikelet bract-like, sheath 3.2–3.5 mm long, brown, with a distinct midrib, partially enclosing the spikelet, with a slender lamina 1.8–3.0 mm long, reddish brown. Spikelets reddish brown, lanceolate, 4–6 mm long, ± terete to somewhat compressed, with 5 or 6 glumes, only topmost 2 fertile, both bisexual, fertile, no reduced glume above the florets; glumes distichous, basal glume 2.2–2.7 mm long, fertile glumes 3.7–4.9(–5.6) mm long, 1.3–1.6 mm wide, membranous, pale red-brown to dark red-brown sparsely scabrous on the keel and margins, lamina glabrous, ovate-lanceolate, acuminate, with a mucro to 0.7 mm long, keel distinct; rachilla shortly elongate and not or scarcely sinuous in fruiting spikelets. Perianth segments 6, whitish, minute, 0.6–1.0 mm long, expanded below, filiform above, with a few stiff apical hairs. Stamens 3; anther connective 3.4–4.3 mm long, subulate; anthers cream, 2.6–3.0 mm long, with a glabrous apical appendage up to 0.5 mm long. Style trifid, base 3.1–4.3 mm long, glabrous and slender below, hairy and dilated in apical third, branches 2.1–2.8 mm long, hispidulous. Nutlet shortly stipitate, stipe c. 0.3 mm long, very constricted, obovoid to obpyriform, obscurely trigonous, dull, mid-brown to dark brown, 1.2–1.5 mm long including the stipe and style base, 0.8–0.9 mm diam., faces smooth, puberulous especially near apex, epidermal cells square–hexagonal, inconspicuous, with three fine white ribs, style base only slightly enlarged, thick, persistent, very shortly conical, c. 0.2 mm long; embryo not examined. Photosynthetic pathway inferred from anatomy to be C3 (Takeda et al. 1985; Orchard 1531). 2n = unknown. [details]
