Cyperaceae taxon details
Carex flaccosperma Dewey
1677729 (urn:lsid:marinespecies.org:taxname:1677729)
accepted
Species
Carex flaccosperma var. flaccosperma Dewey · unaccepted
Carex grisea var. mutica (Torr.) J.Carey · unaccepted
Carex laxiflora var. mutica Torr. · unaccepted
Carex microsperma Steud. · unaccepted
Carex xanthosperma Dewey · unaccepted
- Variety Carex flaccosperma var. flaccosperma Dewey accepted as Carex flaccosperma Dewey
- Variety Carex flaccosperma var. glaucodea (Tuck. ex Olney) Kük. accepted as Carex glaucodea Tuck. ex Olney
- Variety Carex flaccosperma var. pigra (Naczi) D.B.Ward accepted as Carex pigra Naczi
terrestrial
Dewey, C. (1846). Caricography. <em>The American Journal of Sciences and Arts.</em> ser. 2. 2: 245-249., available online at https://www.biodiversitylibrary.org/page/28135694
page(s): 245 [details]
page(s): 245 [details]
Holotype GH 00056883, geounit Louisiana
Holotype GH 00056883, geounit Louisiana [details]
Description Plants densely cespitose; rhizome internodes 1.2–2.8 mm thick. Culms yellow-brown at base, 10–60(–75) cm. Leaves:...
Taxonomic remark Source in seed data: wcs Update namepublishedIn from Amer. J. Sci. Arts II, 2: 245 1846 to Amer. J. Sci. Arts , ser. 2, 2:...
Description Plants densely cespitose; rhizome internodes 1.2–2.8 mm thick. Culms yellow-brown at base, 10–60(–75) cm. Leaves: sheaths glabrous; blades glaucous, widest blades 6.3–14.7 mm wide, smooth abaxially or sparsely antrorsely scaberulous on main veins. Inflorescences 0.40–1 of culm height; peduncles of lateral spikes smooth; peduncles of terminal spikes 0.7–20(–51) mm, barely to much exceeding lateral spikes; proximal bract sheath loose, abaxially glabrous, sheath front apex truncate; ligules (3–)4.7–9 mm; distal bract slightly shorter than to much exceeding terminal spike. Spikes 4–6, distal 2–4 overlapping; lateral spikes pistillate, with 12–39 perigynia, 11–41 × (5–)5.7–8(–9.6) mm, ratio of spike length (in mm) to flower number = (0.86–)1–1.3(–1.6); terminal spikes 6–34 × 1–3.2 mm. Pistillate scales 1.9–2.8(–3.1) × (1.5–)1.7–2.4 mm, margins whitish, entire, apex awnless or with awn to 0.6(–1.6) mm. Staminate scales 3.8–5.3 ´ 1–1.8 mm. Anthers 1.6–2 mm. Perigynia spirally imbricate, 44–57-veined, unwrinkled, oblong-ovoid, (4–)4.2–5.5(–6) × (1.5–)1.7–2.4 mm, (2–)2.2–2.8(–3.1) times as long as wide, obtusely triangular in cross section, dull, base very gradually tapered, apex gradually tapered; beak absent or straight, 0–0.3 mm. Achenes obovoid, 2.5–3.4 × (1.3–)1.4–1.6(–1.7) mm, 0.37–0.5 times as long as perigynia, loosely enveloped by perigynia; stipe straight, (0.2–)0.3–0.5(–0.6) mm; beak straight or bent less than 30°, (0.1–)0.2–0.4(–0.5) mm. [details]
Taxonomic remark Source in seed data: wcs Update namepublishedIn from Amer. J. Sci. Arts II, 2: 245 1846 to Amer. J. Sci. Arts , ser. 2, 2:...
Taxonomic remark Source in seed data: wcs Update namepublishedIn from Amer. J. Sci. Arts II, 2: 245 1846 to Amer. J. Sci. Arts , ser. 2, 2: 245 (1846), information provided by Alan E. on email Jun. 07 2021 More details could be found in [details]
Cyperaceae Working Group. (2025). [see How to cite]. Global Cyperaceae Database. Carex flaccosperma Dewey. Accessed at: https://cyperaceae.org/aphia.php?p=taxdetails&id=1677729 on 2025-09-14
Date
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2024-12-10 11:47:54Z
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Nomenclature
original description
Dewey, C. (1846). Caricography. <em>The American Journal of Sciences and Arts.</em> ser. 2. 2: 245-249., available online at https://www.biodiversitylibrary.org/page/28135694
page(s): 245 [details]
basis of record Plants of the World Online (POWO). , available online at https://powo.science.kew.org/ [details]
page(s): 245 [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 GH 00056883, geounit Louisiana [details]
From editor or global species database
Description Plants densely cespitose; rhizome internodes 1.2–2.8 mm thick. Culms yellow-brown at base, 10–60(–75) cm. Leaves: sheaths glabrous; blades glaucous, widest blades 6.3–14.7 mm wide, smooth abaxially or sparsely antrorsely scaberulous on main veins. Inflorescences 0.40–1 of culm height; peduncles of lateral spikes smooth; peduncles of terminal spikes 0.7–20(–51) mm, barely to much exceeding lateral spikes; proximal bract sheath loose, abaxially glabrous, sheath front apex truncate; ligules (3–)4.7–9 mm; distal bract slightly shorter than to much exceeding terminal spike. Spikes 4–6, distal 2–4 overlapping; lateral spikes pistillate, with 12–39 perigynia, 11–41 × (5–)5.7–8(–9.6) mm, ratio of spike length (in mm) to flower number = (0.86–)1–1.3(–1.6); terminal spikes 6–34 × 1–3.2 mm. Pistillate scales 1.9–2.8(–3.1) × (1.5–)1.7–2.4 mm, margins whitish, entire, apex awnless or with awn to 0.6(–1.6) mm. Staminate scales 3.8–5.3 ´ 1–1.8 mm. Anthers 1.6–2 mm. Perigynia spirally imbricate, 44–57-veined, unwrinkled, oblong-ovoid, (4–)4.2–5.5(–6) × (1.5–)1.7–2.4 mm, (2–)2.2–2.8(–3.1) times as long as wide, obtusely triangular in cross section, dull, base very gradually tapered, apex gradually tapered; beak absent or straight, 0–0.3 mm. Achenes obovoid, 2.5–3.4 × (1.3–)1.4–1.6(–1.7) mm, 0.37–0.5 times as long as perigynia, loosely enveloped by perigynia; stipe straight, (0.2–)0.3–0.5(–0.6) mm; beak straight or bent less than 30°, (0.1–)0.2–0.4(–0.5) mm. [details]Taxonomic remark Source in seed data: wcs Update namepublishedIn from Amer. J. Sci. Arts II, 2: 245 1846 to Amer. J. Sci. Arts , ser. 2, 2: 245 (1846), information provided by Alan E. on email Jun. 07 2021 More details could be found in [details]
To Biodiversity Heritage Library (1 publication) (from synonym Carex laxiflora var. mutica Torr.)
To Biodiversity Heritage Library (15 publications) (from synonym Carex microsperma Steud.)
To Biodiversity Heritage Library (63 publications)
To Biodiversity Heritage Library (9 publications) (from synonym Carex xanthosperma Dewey)
To European Nucleotide Archive, ENA (Carex flaccosperma)
To GenBank (23 nucleotides; 15 proteins)
To International Plant Names Index (IPNI)
To International Plant Names Index (IPNI) (from synonym Carex microsperma Steud.)
To International Plant Names Index (IPNI) (from synonym Carex xanthosperma Dewey)
To International Plant Names Index (IPNI) (from synonym Carex grisea var. mutica (Torr.) J.Carey)
To International Plant Names Index (IPNI) (from synonym Carex laxiflora var. mutica Torr.)
To New York Botanical Garden Steere Herbarium (Carex_laxiflora_mutica_NY39400_holotype_1) (from synonym Carex laxiflora var. mutica Torr.)
To Plants of the World Online (from synonym Carex laxiflora var. mutica Torr.)
To Plants of the World Online (from synonym Carex grisea var. mutica (Torr.) J.Carey)
To Plants of the World Online
To Plants of the World Online (from synonym Carex microsperma Steud.)
To Plants of the World Online (from synonym Carex xanthosperma Dewey)
To The Plant List (from synonym Carex flaccosperma var. flaccosperma Dewey)
To Biodiversity Heritage Library (15 publications) (from synonym Carex microsperma Steud.)
To Biodiversity Heritage Library (63 publications)
To Biodiversity Heritage Library (9 publications) (from synonym Carex xanthosperma Dewey)
To European Nucleotide Archive, ENA (Carex flaccosperma)
To GenBank (23 nucleotides; 15 proteins)
To International Plant Names Index (IPNI)
To International Plant Names Index (IPNI) (from synonym Carex microsperma Steud.)
To International Plant Names Index (IPNI) (from synonym Carex xanthosperma Dewey)
To International Plant Names Index (IPNI) (from synonym Carex grisea var. mutica (Torr.) J.Carey)
To International Plant Names Index (IPNI) (from synonym Carex laxiflora var. mutica Torr.)
To New York Botanical Garden Steere Herbarium (Carex_laxiflora_mutica_NY39400_holotype_1) (from synonym Carex laxiflora var. mutica Torr.)
To Plants of the World Online (from synonym Carex laxiflora var. mutica Torr.)
To Plants of the World Online (from synonym Carex grisea var. mutica (Torr.) J.Carey)
To Plants of the World Online
To Plants of the World Online (from synonym Carex microsperma Steud.)
To Plants of the World Online (from synonym Carex xanthosperma Dewey)
To The Plant List (from synonym Carex flaccosperma var. flaccosperma Dewey)
From editor or global species database
Hosted externally, from synonym
