Cyperaceae - Carex otrubae Podp.

Description Rhizomes short; shoots stout, densely tufted; roots thick, grey-brown; scales brown, remaining as black fibres. Stems 30–100 cm, stout, smooth below, rough above, trigonous, their faces ± flat, slightly winged on angles. Leaves up to 60 cm × 4–10 mm, ± erect, obtusely keeled, tapering to a flat, sharp point, bright green, becoming grey-green when dry and often spotted with pale orange-brown in decay; margins rough; hypostomous; base appearing subauriculate, as it abruptly contracts into the sheath; sheaths white with green veins, becoming brown, soon decaying, with inner face hyaline, not wrinkled; apex variable from concave to rarely lingulate; ligule 5–10 mm, ± acute, tubular, contained within the width of the leaf. Inflorescence an elongate panicle, becoming dense when in fruit; lower bracts setaceous, with leaf-like base, half as long as, or often longer than, the inflorescence; upper bracts glumaceous. Spikes numerous, 8–14 mm, compound, all or most male above and female below. Male glumes 3.5–4 mm, oblanceolate-elliptic, pale orange-brown with green midrib; apex acute. Female glumes 4–5 mm, ovate, pale red- or orange-brown with green midrib; apex acuminate-aristate. Utricles 4–6 mm, ovoid, plano-convex, ± shiny, strongly nerved, green, at maturity red-brown to dark brown and not readily dropping; epidermal cells of adaxial face thin-walled and elongated; beak 1–1.5 mm, rough at apex, bifid, not split at back; stigmas 2; nut oblong-obovoid, biconvex. [details]

Description Culmis usque 50 cm altis, rigidis, crassis, subcompresso-triquetris, lateribus tenuiter concavis, angulis acutis,...

Description Culmis usque 50 cm altis, rigidis, crassis, subcompresso-triquetris, lateribus tenuiter concavis, angulis acutis, compressis, sed non alatis, sub panicula scaberrimis, ceterum solum ad angulos scabris, basin versus etiam ibidem levibus, basi vaginis sordide brunneo-stramineis, dissolutis circumdatis. Foliis culmo brevioribus, 4–5 mm latis, planis, subherbaceis, laete viridibus, vaginis levibus, ligulis lanceolato-obovatis, 5 mm longis, integris; inflorescentia cylindrica, continua, subsimplici, spiculis 6–9 androgynis longioribus subcompositis et vario modo setaceo-bracteatis, bracteis 1–2 cm longis, squamis ovatis, mucronatis, stramineo-rufidulis vel rufescentibus, apicem versus viridi-carinatis. Utriculi squamas paululum superantibus, subcoriaceis, lanceolato-ovatis, plano-convexis, 4–5 mm longis, viridibus, glabris, dorso evidenter, ventre obsoletius nervosis, basi spongiosa, non retinentibus, emarginatis vel inconspicue marginatis, ad angulos subscabris, in rostrum sublongum subsensim attenuatis; nuce planiuscula, 2 mm longa, late elliptica. [details]

Taxonomic citation

Cyperaceae Working Group. (2025). [see How to cite]. Global Cyperaceae Database. Carex otrubae Podp.. Accessed at: https://cyperaceae.org/aphia.php?p=taxdetails&id=1676669 on 2025-12-27

Taxonomic edit history

Date

action

2023-09-06 07:28:28Z

created

Jiménez-Mejías, Pedro

2024-12-10 11:47:54Z

unchecked

db_admin

2025-03-11 11:19:03Z

changed

Márquez-Corro, José Ignacio

Licensing

The webpage text is licensed under a Creative Commons Attribution 4.0 License

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Nomenclature

original description Podpěra, J. (1922). Plantae Moravicae novae vel minus cognitae. Spisy Přír. Fak. Masarykovy Univ. 12: 15.
page(s): 15 [details]

basis of record Plants of the World Online (POWO). , available online at https://powo.science.kew.org/ [details]

Taxonomy

taxonomy source Jermy, A.C.; Simpson, D.A.; Foley, M.J.Y.; Porter, M.S. (2007). Sedges of the British Isles. 554 pp. Botanical Society of Britain & Ireland, United Kingdom. [details] Available for editors

[request]

Other

additional source Li, B. Z.; Zhang, S. R. (2024). An updated species checklist and taxonomic synopsis of Cyperaceae in China. Biodiversity Science. 32(7): 24106., available online at https://doi.org/10.17520/biods.2024106 [details] Available for editors

[request]

Present

Inaccurate

Introduced: alien

Containing type locality

Unknown type K 000960386 [details]

From editor or global species database

Translation Culms up to 50 cm tall, stiff, stout, somewhat compressed-triquetrous, the sides slightly concave; angles acute, compressed but not winged; very scabrous beneath the panicle, elsewhere scabrous only on the angles, becoming smooth toward the base; base surrounded by dirty brownish-straw-colored, tattered sheaths. Leaves shorter than the culm, 4–5 mm wide, flat, somewhat herbaceous, bright green; sheaths smooth; ligules lanceolate-obovate, 5 mm long, entire. Inflorescence cylindrical, continuous, nearly simple, with 6–9 androgynous spikes, the lower ones somewhat compound and variously provided with setaceous bracts; bracts 1–2 cm long; female scales ovate, mucronate, straw-tinged to slightly reddish or reddish, becoming green-keeled toward the apex. Utricles slightly exceeding the scales, somewhat coriaceous, lanceolate-ovate, plano-convex, 4–5 mm long, green, glabrous, conspicuously nerved on the back and more faintly nerved on the ventral side; base spongy; not persistent, emarginate or with inconspicuous margins, subscabrous on the angles, tapering gradually into a somewhat long beak; nut slightly flattened, 2 mm long, broadly elliptic. [details]

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