Cyperaceae taxon details
Schoenus calostachyus (R.Br.) Roem. & Schult.
1681431 (urn:lsid:marinespecies.org:taxname:1681431)
accepted
Species
Chaetospora calostachya R.Br. · unaccepted
Chaetospora calostachys R.Br. · unaccepted
Cyclocampe waigiouensis Steud. · unaccepted
Schoenus calostachyus Poir. · unaccepted
Schoenus triangularis Volkens · unaccepted
- Variety Schoenus calostachyus var. calostachyus (R.Br.) Roem. & Schult. (uncertain > unassessed)
- Variety Schoenus calostachyus var. distans (F.Muell.) Benth. accepted as Schoenus rigens S.T.Blake
terrestrial
Not documented
Lectotype (of Chaetospora calostachya R.Br.) BM...
Lectotype (of Chaetospora calostachya R.Br.) BM 000900960, geounit Queensland [details]
Description Perennials. Rhizomes short. Culms tufted, erect, (30-)70-90 cm tall, obtusely 3-angled to subterete, sulcate, smooth....
Taxonomic remark Source in seed data: tro Updated scientificnameAuthorship from (R.Br.) Roem. & Schult. to (R.Br.) Poir., information...
Description Perennials. Rhizomes short. Culms tufted, erect, (30-)70-90 cm tall, obtusely 3-angled to subterete, sulcate, smooth. Leaves basal and cauline; sheath blackish purple; leaf blade linear, 30-75 cm × 1-2 mm, rigid, 3-veined on abaxial surface, margin scaberulose, apex acute. Involucral bracts leaflike; sheaths black purplish red to reddish black, 1.5-2.5 cm, terete; mouth pale, oblique, membranous. Inflorescences racemose, to 50 cm, very lax, with 2 or 3 very distant fascicles of branches; peduncle 10-15 cm, glabrous; branches solitary or 2(or 3) together, erect, ca. 12.5 cm, unequal, compressed, scaberulose on angles, each bearing 1(-3) spikelets. Spikelets chestnut-brown, oblong to narrowly ovoid, 3-5-flowered, apex acute to acuminate. Glumes distichous, narrowly lanceolate, basal 5 and apical 1 or 2 empty; fertile glumes to 1.5 cm; sterile glumes ca. 0.4 cm, leathery, densely ciliate especially toward apex, keel green. Perianth bristles 4-7, white, ca. 1/2 as long as nutlet, antrorsely scabrous on apical part, easily caducous. Stamens 3; anthers linear, caducous. Style slender, apical half ciliate; stigmas 3, papillate. Nutlet grayish brown, obovoid, 3-sided, reticulately wrinkled, glabrous, base attenuate, apex obscurely beaked. [details]
Taxonomic remark Source in seed data: tro Updated scientificnameAuthorship from (R.Br.) Roem. & Schult. to (R.Br.) Poir., information...
Cyperaceae Working Group. (2025). [see How to cite]. Global Cyperaceae Database. Schoenus calostachyus (R.Br.) Roem. & Schult.. Accessed at: https://cyperaceae.org/aphia.php?p=taxdetails&id=1681431 on 2026-01-02
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2024-12-10 11:47:54Z
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Nomenclature
original description
(of Chaetospora calostachya R.Br.) Brown, R. (1810). Prodromus florae Novae Hollandiae et Insulae Van-Diemen, exhibens characteres plantarum quas annis 1802-1805 per oras utriusque insulae collegit et descripsit Robertus Brown; insertis passim aliis speciebus auctori hucusque cognitis, seu evulgatis, seu ineditis, praesertim Banksianis, in primo itinere navarchi Cook detectis. Vol. 1 pp. [i]-viii, 145-590 p., [1] h. ["Addenda"]. Londini [London]: typis Richardi Taylori et Scoii. Veneunt apud J. Johnson et Socios, in Caementerio Sancti Pauli., available online at https://www.biodiversitylibrary.org/page/6157371
page(s): 233 [details]
basis of record Plants of the World Online (POWO). , available online at https://powo.science.kew.org/ [details]
page(s): 233 [details]
basis of record Plants of the World Online (POWO). , available online at https://powo.science.kew.org/ [details]
Other
additional source
Li, B. Z.; Zhang, S. R. (2024). An updated species checklist and taxonomic synopsis of Cyperaceae in China. <em>Biodiversity Science.</em> 32(7): 24106., available online at https://doi.org/10.17520/biods.2024106 [details] Available for editors 
[request]
[request]
Present Inaccurate Introduced: alien Containing type locality
Lectotype (of Chaetospora calostachya R.Br.) BM 000900960, geounit Queensland [details]
Syntype MEL 2202926, geounit New Holland [details]
From editor or global species database
Description Perennials. Rhizomes short. Culms tufted, erect, (30-)70-90 cm tall, obtusely 3-angled to subterete, sulcate, smooth. Leaves basal and cauline; sheath blackish purple; leaf blade linear, 30-75 cm × 1-2 mm, rigid, 3-veined on abaxial surface, margin scaberulose, apex acute. Involucral bracts leaflike; sheaths black purplish red to reddish black, 1.5-2.5 cm, terete; mouth pale, oblique, membranous. Inflorescences racemose, to 50 cm, very lax, with 2 or 3 very distant fascicles of branches; peduncle 10-15 cm, glabrous; branches solitary or 2(or 3) together, erect, ca. 12.5 cm, unequal, compressed, scaberulose on angles, each bearing 1(-3) spikelets. Spikelets chestnut-brown, oblong to narrowly ovoid, 3-5-flowered, apex acute to acuminate. Glumes distichous, narrowly lanceolate, basal 5 and apical 1 or 2 empty; fertile glumes to 1.5 cm; sterile glumes ca. 0.4 cm, leathery, densely ciliate especially toward apex, keel green. Perianth bristles 4-7, white, ca. 1/2 as long as nutlet, antrorsely scabrous on apical part, easily caducous. Stamens 3; anthers linear, caducous. Style slender, apical half ciliate; stigmas 3, papillate. Nutlet grayish brown, obovoid, 3-sided, reticulately wrinkled, glabrous, base attenuate, apex obscurely beaked. [details]Taxonomic remark Source in seed data: tro Updated scientificnameAuthorship from (R.Br.) Roem. & Schult. to (R.Br.) Poir., information provided by Alan E. on email Oct. 12 2020 More details could be found in [details]
To Biodiversity Heritage Library (1 publication) (from synonym Schoenus triangularis Volkens)
To Biodiversity Heritage Library (18 publications) (from synonym Chaetospora calostachya R.Br.)
To Biodiversity Heritage Library (3 publications) (from synonym Cyclocampe waigiouensis Steud.)
To Biodiversity Heritage Library (33 publications)
To Biodiversity Heritage Library (33 publications) (from synonym Schoenus calostachyus Poir.)
To European Nucleotide Archive, ENA (Schoenus calostachyus) (from synonym Schoenus calostachyus Poir.)
To European Nucleotide Archive, ENA (Schoenus calostachyus)
To International Plant Names Index (IPNI)
To International Plant Names Index (IPNI) (from synonym Schoenus calostachyus Poir.)
To International Plant Names Index (IPNI) (from synonym Chaetospora calostachya R.Br.)
To International Plant Names Index (IPNI) (from synonym Cyclocampe waigiouensis Steud.)
To International Plant Names Index (IPNI) (from synonym Chaetospora calostachys R.Br.)
To International Plant Names Index (IPNI) (from synonym Schoenus triangularis Volkens)
To Plants of the World Online (from synonym Schoenus triangularis Volkens)
To Plants of the World Online (from synonym Chaetospora calostachys R.Br.)
To Plants of the World Online (from synonym Cyclocampe waigiouensis Steud.)
To Plants of the World Online
To Royal Botanic Gardens, Kew (Schoenus calostachyus K000357559 type 1) (from synonym Schoenus calostachyus Poir.)
To The Plant List (from synonym Schoenus calostachyus Poir.)
To The Plant List (from synonym Chaetospora calostachya R.Br.)
To US Herbarium (Schoenus triangularis US775974 type 1) (from synonym Schoenus triangularis Volkens)
To Biodiversity Heritage Library (18 publications) (from synonym Chaetospora calostachya R.Br.)
To Biodiversity Heritage Library (3 publications) (from synonym Cyclocampe waigiouensis Steud.)
To Biodiversity Heritage Library (33 publications)
To Biodiversity Heritage Library (33 publications) (from synonym Schoenus calostachyus Poir.)
To European Nucleotide Archive, ENA (Schoenus calostachyus) (from synonym Schoenus calostachyus Poir.)
To European Nucleotide Archive, ENA (Schoenus calostachyus)
To International Plant Names Index (IPNI)
To International Plant Names Index (IPNI) (from synonym Schoenus calostachyus Poir.)
To International Plant Names Index (IPNI) (from synonym Chaetospora calostachya R.Br.)
To International Plant Names Index (IPNI) (from synonym Cyclocampe waigiouensis Steud.)
To International Plant Names Index (IPNI) (from synonym Chaetospora calostachys R.Br.)
To International Plant Names Index (IPNI) (from synonym Schoenus triangularis Volkens)
To Plants of the World Online (from synonym Schoenus triangularis Volkens)
To Plants of the World Online (from synonym Chaetospora calostachys R.Br.)
To Plants of the World Online (from synonym Cyclocampe waigiouensis Steud.)
To Plants of the World Online
To Royal Botanic Gardens, Kew (Schoenus calostachyus K000357559 type 1) (from synonym Schoenus calostachyus Poir.)
To The Plant List (from synonym Schoenus calostachyus Poir.)
To The Plant List (from synonym Chaetospora calostachya R.Br.)
To US Herbarium (Schoenus triangularis US775974 type 1) (from synonym Schoenus triangularis Volkens)
