Cyperaceae taxon details
Carex venusta Dewey
1677349 (urn:lsid:marinespecies.org:taxname:1677349)
accepted
Species
Carex glabra Boott · unaccepted
Carex oblita Steud. · unaccepted
Carex venusta var. glabra L.H.Bailey · unaccepted
Carex venusta var. minor Boeckeler · unaccepted
Carex venusta var. oblita (Steud.) Kük. · unaccepted
Carex venusta var. venusta · unaccepted
- Variety Carex venusta var. glabra L.H.Bailey accepted as Carex venusta Dewey
- Variety Carex venusta var. minor Boeckeler accepted as Carex venusta Dewey
- Variety Carex venusta var. oblita (Steud.) Kük. accepted as Carex venusta Dewey
- Variety Carex venusta var. venusta accepted as Carex venusta Dewey
terrestrial
Dewey, C. (1834). Caricography. <em>American Journal of Science and Arts.</em> 26: 107-108., available online at https://www.biodiversitylibrary.org/page/15985407#page/117/mode/1up
page(s): 107 [details]
page(s): 107 [details]
Description Plants densely cespitose. Culms dark maroon at base; flowering stems 30–90 cm, longer than leaves at maturity, 0.8–1 mm...
Description Plants densely cespitose. Culms dark maroon at base; flowering stems 30–90 cm, longer than leaves at maturity, 0.8–1 mm thick, glabrous but scabrous within inflorescence. Leaves: basal sheaths maroon, bladeless, glabrous on back; others grading from maroon to green on back, pale brown-hyaline and red dotted on front, pubescent near apex; blades flat, 2.8–7.2 mm wide, glabrous on both surfaces, margins smooth or finely scabrous. Inflorescences: peduncles of lateral spikes slender, 5–100 mm, finely scabrous; peduncle of terminal spike less than 15 mm, finely scabrous; proximal bracts equaling inflorescences or shorter; sheaths 10–70 mm; blades 1.5–3.5 mm wide. Lateral spikes 3–5, 1 per node, well separated, erect to nodding or drooping at maturity, pistillate with 10–40 perigynia attached 1–3 mm apart, narrowly oblong-cylindric, 10–50 × 4–5 mm. Terminal spike staminate or sometimes gynecandrous with a few pistillate flowers distally, 12–55 × 1–2 mm. Pistillate scales suffused with reddish brown to chestnut with hyaline margins and broad green midrib, ovate-oblong, shorter than mature perigynia, apex obtuse, acute, or sometimes mucronate, glabrous except scabrous midrib. Perigynia olive-green, copiously red dotted, conspicuously 10–12-veined, veins about equal in size, loosely enveloping achene, ovoid-ellipsoid to lance-ovoid, 4.6–9 × 1.2–2.2 mm, membranous to coriaceous, base with short stipe, apex tapering to very short beak, glabrous or short-pubescent; beak minutely bidentate, 0.3–0.8 mm, ciliate between apical teeth. Achenes distinctly stipitate, 2–2.5 × 1–1.5 mm, stipe 1–1.5 mm. 2n = 42, 44, 46, 48, 50. [details]
Cyperaceae Working Group. (2025). [see How to cite]. Global Cyperaceae Database. Carex venusta Dewey. Accessed at: https://cyperaceae.org/aphia.php?p=taxdetails&id=1677349 on 2026-05-31
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Nomenclature
original description
Dewey, C. (1834). Caricography. <em>American Journal of Science and Arts.</em> 26: 107-108., available online at https://www.biodiversitylibrary.org/page/15985407#page/117/mode/1up
page(s): 107 [details]
page(s): 107 [details]
Other
additional source
Ball, P.W.; Reznicek, A.A.; Murray, D.F. (2002). Magnoliophyta: Commelinidae (in part): Cyperaceae. In: Flora of North America. Vol. 23. Oxford University Press, New York., available online at http://floranorthamerica.org/Cyperaceae [details] Available for editors 
[request]
[request]
Present Inaccurate Introduced: alien Containing type locality
From editor or global species database
Additional information Carex venusta has been divided into two varieties: one with glabrous perigynia and slightly smaller perigynia and the typical variety with pubescent perigynia. Both varieties are named from types from the Gulf coastal plain. Varieties are not recognized here because variability in the characters used to separate them is greater within populations than between populations. However, there do seem to be two taxonomic entities within this species: one with a distribution from Texas to North Carolina and the other with a distribution from North Carolina to Long Island, New York. The two groups differ slightly in perigynium size and shape and have different, but overlapping, series of chromosome numbers and strikingly different allozyme patterns (M. J. Waterway 1988). The northern group always has glabrous perigynia while the southern group has both glabrous and pubescent perigynia, often in the same population. Whether to recognize these variants as varieties of C. venusta or as distinct species is the subject of ongoing study. Hybrids between both groups and C. debilis have been confirmed. [details]Description Plants densely cespitose. Culms dark maroon at base; flowering stems 30–90 cm, longer than leaves at maturity, 0.8–1 mm thick, glabrous but scabrous within inflorescence. Leaves: basal sheaths maroon, bladeless, glabrous on back; others grading from maroon to green on back, pale brown-hyaline and red dotted on front, pubescent near apex; blades flat, 2.8–7.2 mm wide, glabrous on both surfaces, margins smooth or finely scabrous. Inflorescences: peduncles of lateral spikes slender, 5–100 mm, finely scabrous; peduncle of terminal spike less than 15 mm, finely scabrous; proximal bracts equaling inflorescences or shorter; sheaths 10–70 mm; blades 1.5–3.5 mm wide. Lateral spikes 3–5, 1 per node, well separated, erect to nodding or drooping at maturity, pistillate with 10–40 perigynia attached 1–3 mm apart, narrowly oblong-cylindric, 10–50 × 4–5 mm. Terminal spike staminate or sometimes gynecandrous with a few pistillate flowers distally, 12–55 × 1–2 mm. Pistillate scales suffused with reddish brown to chestnut with hyaline margins and broad green midrib, ovate-oblong, shorter than mature perigynia, apex obtuse, acute, or sometimes mucronate, glabrous except scabrous midrib. Perigynia olive-green, copiously red dotted, conspicuously 10–12-veined, veins about equal in size, loosely enveloping achene, ovoid-ellipsoid to lance-ovoid, 4.6–9 × 1.2–2.2 mm, membranous to coriaceous, base with short stipe, apex tapering to very short beak, glabrous or short-pubescent; beak minutely bidentate, 0.3–0.8 mm, ciliate between apical teeth. Achenes distinctly stipitate, 2–2.5 × 1–1.5 mm, stipe 1–1.5 mm. 2n = 42, 44, 46, 48, 50. [details]
Ecology Fruiting late spring–early summer. Swamp forests, bogs, wet places in pine forests, bays, hammocks, roadside ditches. [details]
To Biodiversity Heritage Library (39 publications) (from synonym Carex glabra Boott)
To Biodiversity Heritage Library (44 publications)
To Biodiversity Heritage Library (47 publications) (from synonym Carex oblita Steud.)
To European Nucleotide Archive, ENA (Carex venusta)
To GenBank (4 nucleotides; 0 proteins)
To International Plant Names Index (IPNI)
To International Plant Names Index (IPNI) (from synonym Carex glabra Boott)
To International Plant Names Index (IPNI) (from synonym Carex oblita Steud.)
To International Plant Names Index (IPNI) (from synonym Carex venusta var. glabra L.H.Bailey)
To International Plant Names Index (IPNI) (from synonym Carex venusta var. minor Boeckeler)
To International Plant Names Index (IPNI) (from synonym Carex venusta var. oblita (Steud.) Kük.)
To Plants of the World Online (from synonym Carex venusta var. oblita (Steud.) Kük.)
To Plants of the World Online (from synonym Carex venusta var. minor Boeckeler)
To Plants of the World Online (from synonym Carex venusta var. glabra L.H.Bailey)
To Plants of the World Online
To Plants of the World Online (from synonym Carex glabra Boott)
To Plants of the World Online (from synonym Carex oblita Steud.)
To The Plant List (from synonym Carex venusta var. venusta)
To Biodiversity Heritage Library (44 publications)
To Biodiversity Heritage Library (47 publications) (from synonym Carex oblita Steud.)
To European Nucleotide Archive, ENA (Carex venusta)
To GenBank (4 nucleotides; 0 proteins)
To International Plant Names Index (IPNI)
To International Plant Names Index (IPNI) (from synonym Carex glabra Boott)
To International Plant Names Index (IPNI) (from synonym Carex oblita Steud.)
To International Plant Names Index (IPNI) (from synonym Carex venusta var. glabra L.H.Bailey)
To International Plant Names Index (IPNI) (from synonym Carex venusta var. minor Boeckeler)
To International Plant Names Index (IPNI) (from synonym Carex venusta var. oblita (Steud.) Kük.)
To Plants of the World Online (from synonym Carex venusta var. oblita (Steud.) Kük.)
To Plants of the World Online (from synonym Carex venusta var. minor Boeckeler)
To Plants of the World Online (from synonym Carex venusta var. glabra L.H.Bailey)
To Plants of the World Online
To Plants of the World Online (from synonym Carex glabra Boott)
To Plants of the World Online (from synonym Carex oblita Steud.)
To The Plant List (from synonym Carex venusta var. venusta)
