Cyperaceae taxon details
Cyperus diandrus Torr.
1680726 (urn:lsid:marinespecies.org:taxname:1680726)
accepted
Species
Cyperus diandrus f. elongatus (Britton) Fernald · unaccepted
Cyperus diandrus var. elongatus Britton · unaccepted
Cyperus diandrus var. pauciflorus Alph.Wood · unaccepted
Pycreus diandrus (Torr.) C.B.Clarke · unaccepted
Torreya maritima Raf. · unaccepted
- Variety Cyperus diandrus var. castaneus (Pursh) Torr. (uncertain > unassessed)
- Forma Cyperus diandrus f. elongatus (Britton) Fernald accepted as Cyperus diandrus Torr.
- Variety Cyperus diandrus var. bipartitus (Torr.) Kük. accepted as Cyperus bipartitus Torr.
- Variety Cyperus diandrus var. capitatus Britton accepted as Cyperus melanostachyus Kunth
- Variety Cyperus diandrus var. castaneus (Pursh) Torr. accepted as Cyperus bipartitus Torr.
- Variety Cyperus diandrus var. elongatus Britton accepted as Cyperus diandrus Torr.
- Variety Cyperus diandrus var. pauciflorus Alph.Wood accepted as Cyperus diandrus Torr.
terrestrial
Not documented
Description Herbs, annual, cespitose, with fibrous roots. Culms trigonous, 4–25(–35) cm, glabrous. Leaves flat, 5–20 cm ×...
Taxonomic remark Source in seed data: wcs Updated namepublishedIn from Cat. Pl. New York 89 1819 to Cat. Pl. N. York 90. 1819 , information...
Description Herbs, annual, cespitose, with fibrous roots. Culms trigonous, 4–25(–35) cm, glabrous. Leaves flat, 5–20 cm × 1.5–3 mm. Inflorescences: heads ± digitate, 12–22 mm diam.; rays 3–6, 1–6 cm; bracts 1–4, ± horizontal, flat, 1.5–15 cm × 1.5–3 mm. Spikelets 6–12, oblong-lanceoloid, compressed, 5–10 × 2.8–3.2 mm; floral scales 8–28, closely imbricate, stramineous to light brown or clear (marginal band bright red, spikelet thus appearing dark margined), laterally ribless, oblong to ovate, 2.5–3 × 1.6–1.9 mm. Flowers: stamens 2(–3); anthers 0.3 mm, connective apex reddish, subulate, 0.1–0.2 mm; styles 0.3–0.5 mm; stigmas 2.2–3.1 mm. Achenes brown, network of ridges forming isodiametric or square cells, sessile or stipitate, obovoid to ovoid, 1–1.2 × 0.5–0.6 mm, stipe, if present, 0.1 mm, apex obtuse, apiculate, surfaces minutely punctate. [details]
Taxonomic remark Source in seed data: wcs Updated namepublishedIn from Cat. Pl. New York 89 1819 to Cat. Pl. N. York 90. 1819 , information...
Taxonomic remark Source in seed data: wcs Updated namepublishedIn from Cat. Pl. New York 89 1819 to Cat. Pl. N. York 90. 1819 , information provided by Alan E. on email Oct. 12 2020 More details could be found in [details]
Cyperaceae Working Group. (2025). [see How to cite]. Global Cyperaceae Database. Cyperus diandrus Torr.. Accessed at: https://www.cyperaceae.org/aphia.php?p=taxdetails&id=1680726 on 2025-12-18
Date
action
by
2024-12-10 11:47:54Z
unchecked
db_admin
The webpage text is licensed under a Creative Commons
Attribution 4.0 License
Nomenclature
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
From editor or global species database
Description Herbs, annual, cespitose, with fibrous roots. Culms trigonous, 4–25(–35) cm, glabrous. Leaves flat, 5–20 cm × 1.5–3 mm. Inflorescences: heads ± digitate, 12–22 mm diam.; rays 3–6, 1–6 cm; bracts 1–4, ± horizontal, flat, 1.5–15 cm × 1.5–3 mm. Spikelets 6–12, oblong-lanceoloid, compressed, 5–10 × 2.8–3.2 mm; floral scales 8–28, closely imbricate, stramineous to light brown or clear (marginal band bright red, spikelet thus appearing dark margined), laterally ribless, oblong to ovate, 2.5–3 × 1.6–1.9 mm. Flowers: stamens 2(–3); anthers 0.3 mm, connective apex reddish, subulate, 0.1–0.2 mm; styles 0.3–0.5 mm; stigmas 2.2–3.1 mm. Achenes brown, network of ridges forming isodiametric or square cells, sessile or stipitate, obovoid to ovoid, 1–1.2 × 0.5–0.6 mm, stipe, if present, 0.1 mm, apex obtuse, apiculate, surfaces minutely punctate. [details]Taxonomic remark Source in seed data: wcs Updated namepublishedIn from Cat. Pl. New York 89 1819 to Cat. Pl. N. York 90. 1819 , 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 Pycreus diandrus (Torr.) C.B.Clarke)
To Biodiversity Heritage Library (1 publication) (from synonym Cyperus diandrus var. elongatus Britton)
To Biodiversity Heritage Library (368 publications)
To Biodiversity Heritage Library (5 publications) (from synonym Torreya maritima Raf.)
To European Nucleotide Archive, ENA (Cyperus diandrus)
To GenBank (3 nucleotides; 2 proteins)
To International Plant Names Index (IPNI)
To International Plant Names Index (IPNI) (from synonym Torreya maritima Raf.)
To International Plant Names Index (IPNI) (from synonym Pycreus diandrus (Torr.) C.B.Clarke)
To International Plant Names Index (IPNI) (from synonym Cyperus diandrus var. pauciflorus Alph.Wood)
To International Plant Names Index (IPNI) (from synonym Cyperus diandrus var. elongatus Britton)
To International Plant Names Index (IPNI) (from synonym Cyperus diandrus f. elongatus (Britton) Fernald)
To New York Botanical Garden Steere Herbarium (Cyperus_diandrus_NY11643_type_1)
To New York Botanical Garden Steere Herbarium (Cyperus_diandrus_NY11644_type_1)
To Plants of the World Online (from synonym Torreya maritima Raf.)
To Plants of the World Online
To Plants of the World Online (from synonym Pycreus diandrus (Torr.) C.B.Clarke)
To Plants of the World Online (from synonym Cyperus diandrus var. pauciflorus Alph.Wood)
To Plants of the World Online (from synonym Cyperus diandrus var. elongatus Britton)
To Plants of the World Online (from synonym Cyperus diandrus f. elongatus (Britton) Fernald)
To Biodiversity Heritage Library (1 publication) (from synonym Cyperus diandrus var. elongatus Britton)
To Biodiversity Heritage Library (368 publications)
To Biodiversity Heritage Library (5 publications) (from synonym Torreya maritima Raf.)
To European Nucleotide Archive, ENA (Cyperus diandrus)
To GenBank (3 nucleotides; 2 proteins)
To International Plant Names Index (IPNI)
To International Plant Names Index (IPNI) (from synonym Torreya maritima Raf.)
To International Plant Names Index (IPNI) (from synonym Pycreus diandrus (Torr.) C.B.Clarke)
To International Plant Names Index (IPNI) (from synonym Cyperus diandrus var. pauciflorus Alph.Wood)
To International Plant Names Index (IPNI) (from synonym Cyperus diandrus var. elongatus Britton)
To International Plant Names Index (IPNI) (from synonym Cyperus diandrus f. elongatus (Britton) Fernald)
To New York Botanical Garden Steere Herbarium (Cyperus_diandrus_NY11643_type_1)
To New York Botanical Garden Steere Herbarium (Cyperus_diandrus_NY11644_type_1)
To Plants of the World Online (from synonym Torreya maritima Raf.)
To Plants of the World Online
To Plants of the World Online (from synonym Pycreus diandrus (Torr.) C.B.Clarke)
To Plants of the World Online (from synonym Cyperus diandrus var. pauciflorus Alph.Wood)
To Plants of the World Online (from synonym Cyperus diandrus var. elongatus Britton)
To Plants of the World Online (from synonym Cyperus diandrus f. elongatus (Britton) Fernald)
From editor or global species database
Hosted externally
Hosted externally
