Cyperaceae taxon details
Rhynchospora seccoi C.S.Nunes, Silva Filho & A.Gil
1681242 (urn:lsid:marinespecies.org:taxname:1681242)
accepted
Species
terrestrial
De, Sá; Nunes, C.; Silva, Da; Silva Filho, P. J.; Thomas, W. W.; Gil, A. D. S. B. (2019). Rhynchospora seccoi, a new species of rhynchospora sect. Tenues (cyperaceae) from brazilian amazon (serra dos carajás, pará state). Phytotaxa, 405(2): 91-100., available online at https://doi.org/10.11646/phytotaxa.405.2.4
page(s): 92 [details]
page(s): 92 [details]
Holotype , geounit Pará
Holotype, geounit Pará [details]
Description Cespitose annual herbs, 5–47 cm tall. Culms 4–47 × 0.04–0.12 cm, ascending, flexuous, trigonous to obtusely...
Description Cespitose annual herbs, 5–47 cm tall. Culms 4–47 × 0.04–0.12 cm, ascending, flexuous, trigonous to obtusely trigonous in cross section, glabrous, green to stramineous when dry, sometimes longitudinally sulcate. Leaves 2.7–27 × 0.03 0.11 cm, ascending, cauline, rarely basal and cauline, 1–2(3) per culm, sometimes the lowest ones with reduced blades; sheath 0.7–5.1 cm long, papyraceous, with the distal half membranaceous, glabrous, green, light brown, or brown to stramineous when dry, inner band glossy with reticulate cells; blades 2–22 cm long, papyraceous, longitudinally canaliculate, glabrous, green to stramineous when dry, adaxially 4–8 ribbed. Synflorescence comprising 1 terminal and 2–3 axillary, congested paniculodia; terminal paniculodium 0.8–2 × 0.7–1.8 cm; axillary paniculodia 0.7–1.4 × 0.5–1.3 cm; involucral bracts leaf-like 1–20 × 0.1–0.3 cm, reducing in size gradually toward the apex of the synflorescence, glabrous, green to stramineous when dry, sometimes with brown maculae on the inner band; branches slender and filiform, obtusely trigonous or subterete in cross section; spikelets 3.2–5.1 × 0.8–1 mm long, ovoid-lanceoloid to ellipsoid, grouped in fascicles; rachilla flexuous, canaliculate, glabrous; glumes 5–8, persistent in mature spikelet; the basal ones 4–6, 1.7–2.8 × 0.9–1.8 mm, fertile, ovate to oval-lanceolate, membranaceous, stramineous, glabrous, acute at apex, short-mucronate, margin not hyaline, midcosta green; the distal ones 1–2, 1–1.7 × 0.3–0.6 mm, sterile, lanceolate, membranaceous to submembranaceous, stramineous, acute at apex, short-mucronate, margin not hyaline, midcosta indistinct; perianth bristles absent; stamens 3, the filaments 1.5–2.5 mm long, the anthers 0.6 mm long; style bifid, 1.5–1.9 mm long. Nutlet 0.6–1.0 × 0.4–0.7 mm, turgid-biconvex, obovoid, rounded-obovoid or ellipsoid, stramineous to dark brown, the surface transversely rugose, with 8–10(12) transverse ridges comprised of vertically oriented linear cells, the apex rounded, the base acute-obtuse narrowing to a short stipe (ca. 0.05 mm long). Style-base ca. 0.1 × 0.2–0.4 mm, shallowly triangular, brown, shortly bilobed at base, the lobes not extending along the shoulders of nutlet. [details]
Cyperaceae Working Group. (2025). [see How to cite]. Global Cyperaceae Database. Rhynchospora seccoi C.S.Nunes, Silva Filho & A.Gil. Accessed at: https://cyperaceae.org/aphia.php?p=taxdetails&id=1681242 on 2025-09-13
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2024-12-10 11:47:54Z
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Nomenclature
original description
De, Sá; Nunes, C.; Silva, Da; Silva Filho, P. J.; Thomas, W. W.; Gil, A. D. S. B. (2019). Rhynchospora seccoi, a new species of rhynchospora sect. Tenues (cyperaceae) from brazilian amazon (serra dos carajás, pará state). Phytotaxa, 405(2): 91-100., available online at https://doi.org/10.11646/phytotaxa.405.2.4
page(s): 92 [details]
basis of record Plants of the World Online (POWO). , available online at https://powo.science.kew.org/ [details]
page(s): 92 [details]
basis of record Plants of the World Online (POWO). , available online at https://powo.science.kew.org/ [details]
Present Inaccurate Introduced: alien Containing type locality
Holotype, geounit Pará [details]
From editor or global species database
Description Cespitose annual herbs, 5–47 cm tall. Culms 4–47 × 0.04–0.12 cm, ascending, flexuous, trigonous to obtusely trigonous in cross section, glabrous, green to stramineous when dry, sometimes longitudinally sulcate. Leaves 2.7–27 × 0.03 0.11 cm, ascending, cauline, rarely basal and cauline, 1–2(3) per culm, sometimes the lowest ones with reduced blades; sheath 0.7–5.1 cm long, papyraceous, with the distal half membranaceous, glabrous, green, light brown, or brown to stramineous when dry, inner band glossy with reticulate cells; blades 2–22 cm long, papyraceous, longitudinally canaliculate, glabrous, green to stramineous when dry, adaxially 4–8 ribbed. Synflorescence comprising 1 terminal and 2–3 axillary, congested paniculodia; terminal paniculodium 0.8–2 × 0.7–1.8 cm; axillary paniculodia 0.7–1.4 × 0.5–1.3 cm; involucral bracts leaf-like 1–20 × 0.1–0.3 cm, reducing in size gradually toward the apex of the synflorescence, glabrous, green to stramineous when dry, sometimes with brown maculae on the inner band; branches slender and filiform, obtusely trigonous or subterete in cross section; spikelets 3.2–5.1 × 0.8–1 mm long, ovoid-lanceoloid to ellipsoid, grouped in fascicles; rachilla flexuous, canaliculate, glabrous; glumes 5–8, persistent in mature spikelet; the basal ones 4–6, 1.7–2.8 × 0.9–1.8 mm, fertile, ovate to oval-lanceolate, membranaceous, stramineous, glabrous, acute at apex, short-mucronate, margin not hyaline, midcosta green; the distal ones 1–2, 1–1.7 × 0.3–0.6 mm, sterile, lanceolate, membranaceous to submembranaceous, stramineous, acute at apex, short-mucronate, margin not hyaline, midcosta indistinct; perianth bristles absent; stamens 3, the filaments 1.5–2.5 mm long, the anthers 0.6 mm long; style bifid, 1.5–1.9 mm long. Nutlet 0.6–1.0 × 0.4–0.7 mm, turgid-biconvex, obovoid, rounded-obovoid or ellipsoid, stramineous to dark brown, the surface transversely rugose, with 8–10(12) transverse ridges comprised of vertically oriented linear cells, the apex rounded, the base acute-obtuse narrowing to a short stipe (ca. 0.05 mm long). Style-base ca. 0.1 × 0.2–0.4 mm, shallowly triangular, brown, shortly bilobed at base, the lobes not extending along the shoulders of nutlet. [details]
To European Nucleotide Archive, ENA (Rhynchospora seccoi)
To GenBank (6 nucleotides; 0 proteins)
To International Plant Names Index (IPNI)
To Plants of the World Online
To GenBank (6 nucleotides; 0 proteins)
To International Plant Names Index (IPNI)
To Plants of the World Online
From editor or global species database
