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This genus is accepted, and its native range is Cosmopolitan.
A specimen from Kew's Herbarium


Cyperaceae, K Hoenselaar, B. Verdcourt & H. Beentje. Hypolytrum, D Simpson. Fuirena, M Muasya. Flora of Tropical East Africa. 2010

Morphology General Habit
Annual or short lived-perennials; tufted or mat-forming
Morphology Culms
Culm consisting of several internodes (in I fluitans and I graminoides) or reduced to peduncle only
Morphology Leaves
Leaves eligulate, of a minute lobe or elongated to form a linear blade
Morphology Reproductive morphology Inflorescences
Inflorescence with 1–several spikelets, subtended by a single involucral bract
Morphology Reproductive morphology Inflorescences Bracts
Bract shorter than spikelets, resulting in a terminal inflorescence, or longer and continuing in direction of culm resulting in a pseudolateral inflorescence
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets terete, with spirally arranged glumes, sometimes proliferating.
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes ovate to obovate, green to reddish-brown, carinate, acute to obtuse, arranged on the rachilla with the space between successive glumes < 0.1 mm
Morphology Reproductive morphology Flowers
Flowers bisexual.
Morphology Reproductive morphology Flowers Perianth
Perianth segments absent
Morphology Reproductive morphology Flowers Androecium Stamens
Stamens 1–3.
Morphology Reproductive morphology Flowers Androecium Stamens Filaments
Filament ribbon-like.
Morphology Reproductive morphology Flowers Androecium Stamens Anthers
Anther 0.2–2.5 mm long, apex crested
Morphology Reproductive morphology Flowers Gynoecium Pistil
Pistil with 2–3 stigma branches
Morphology Reproductive morphology Fruits
Nutlets 2- or 3-sided, smooth, reticulate, papillose or striate.
A mainly southern hemisphere genus with ± 60 species.

Native to:

Afghanistan, Alabama, Albania, Algeria, Amsterdam-St.Paul Is, Angola, Antipodean Is., Argentina Northeast, Argentina Northwest, Argentina South, Arkansas, Assam, Austria, Azores, Baleares, Baltic States, Belarus, Belgium, Bolivia, Borneo, Botswana, Brazil South, British Columbia, Bulgaria, Burundi, California, Cameroon, Canary Is., Cape Provinces, Cape Verde, Central European Rus, Chatham Is., Chile Central, Chile North, Chile South, China North-Central, China South-Central, China Southeast, Colombia, Comoros, Corse, Costa Rica, Cyprus, Czechoslovakia, Denmark, East Aegean Is., East European Russia, East Himalaya, Ecuador, Egypt, Eritrea, Ethiopia, Falkland Is., Florida, France, Free State, Føroyar, Georgia, Germany, Great Britain, Greece, Guatemala, Gulf of Guinea Is., Hungary, Iceland, Illinois, India, Inner Mongolia, Iran, Ireland, Italy, Japan, Jawa, Juan Fernández Is., Kansas, Kazakhstan, Kentucky, Kenya, Kermadec Is., Kirgizstan, Kriti, KwaZulu-Natal, Lebanon-Syria, Lesotho, Libya, Louisiana, Macquarie Is., Madagascar, Madeira, Malawi, Mali, Mexico Northwest, Mississippi, Missouri, Morocco, Mozambique, Myanmar, Namibia, Nepal, Netherlands, New Guinea, New South Wales, New Zealand North, New Zealand South, Nigeria, Norfolk Is., North Carolina, North Caucasus, Northern Provinces, Northern Territory, Northwest European R, Norway, Oklahoma, Oregon, Pakistan, Palestine, Panamá, Peru, Philippines, Poland, Portugal, Qinghai, Queensland, Romania, Rwanda, Réunion, Sardegna, Saudi Arabia, Sicilia, South Australia, South Carolina, South European Russi, Spain, Sri Lanka, St.Helena, Sudan, Sulawesi, Sumatera, Swaziland, Sweden, Switzerland, Tadzhikistan, Tanzania, Tasmania, Tennessee, Texas, Thailand, Tibet, Transcaucasus, Tristan da Cunha, Tunisia, Turkey, Turkey-in-Europe, Uganda, Ukraine, Uruguay, Uzbekistan, Venezuela, Victoria, Vietnam, Washington, West Himalaya, Western Australia, Xinjiang, Yemen, Yugoslavia, Zambia, Zaïre, Zimbabwe

Introduced into:

Fiji, Mauritius, New Jersey, Pennsylvania, Virginia, Windward Is.

Isolepis R.Br. appears in other Kew resources:

Date Reference Identified As Barcode Type Status
Wallich, N. [Cat. no. 3470], Nepal K001119486
Wallich, N. [Cat. no. 3474], Myanmar K001119490
Wallich, N. [Cat. no. 3481] K001119514
De Silva, F. [Cat. no. 3484] K001119521
s.coll. [Cat. no. 3486] K001119526
s.coll. [Cat. no. 3487] K001119532
s.coll. [Cat. no. 3488] K001119535
s.coll. [Cat. no. 3490] K001119538
s.coll. [Cat. no. 3496] K001119557
Wallich, N. [Cat. no. 3531], India K001119665
s.coll. [Cat. no. 3477] K001119493
s.coll. [Cat. no. 3487] K001119530
s.coll. [Cat. no. 3475], India K001119491
s.coll. [Cat. no. 3479], India K001119503
s.coll. [Cat. no. 3471] K001119487
Wallich, N. [Cat. no. 3473], Malaysia K001119489
De Silva, F. [Cat. no. 3476], India K001119492
s.coll. [Cat. no. 3490] K001119539
s.coll. [Cat. no. 3485] K001119525
s.coll. [Cat. no. 3487] K001119531
Wallich, N. [Cat. no. 3490], Nepal K001119542
Wallich, N. [Cat. no. 3481], Nepal K001119512
s.coll. [Cat. no. 3492] K001119553
s.coll. [Cat. no. 3479], India K001119501
s.coll. [Cat. no. 3477], India K001119496
Wallich, N. [Cat. no. 3487], India K001119533
s.coll. [Cat. no. 3477], India K001119495
s.coll. [Cat. no. 3493] K001119554
s.coll. [Cat. no. 3486] K001119527
Wallich, N. [Cat. no. 3497], Nepal K001119560
s.coll. [Cat. no. 3470] K001119483
Wallich, N. [Cat. no. 3480], India K001119507
s.coll. [Cat. no. 3484], Bangladesh K001119520
Wallich, N. [Cat. no. 3490], India K001119541
Wallich, N. [Cat. no. 3478], Myanmar K001119499
s.coll. [Cat. no. 3489], India K001119536
s.coll. [Cat. no. 3488] K001119534
s.coll. [Cat. no. 3470] K001119484
s.coll. [Cat. no. 3481] K001119511
Wallich, N. [Cat. no. 3478], Myanmar K001119500
Wallich, N. [Cat. no. 3479], Nepal K001119505
s.coll. [Cat. no. 3480] K001119508
s.coll. [Cat. no. 3487] K001119529
s.coll. [Cat. no. 3472], India K001119488
s.coll. [Cat. no. 3482] K001119516
Blinkworth, R. [Cat. no. 3494], India K001119555
De Silva, F. [Cat. no. 3479] K001119506
s.coll. [Cat. no. 3478] K001119498
Wallich, N. [Cat. no. 3532], Malaysia K001119666
s.coll. [Cat. no. 3483] K001119519
Wallich, N. [Cat. no. 3484], Myanmar K001119522
s.coll. [Cat. no. 3497] K001119559
Wallich, N. [Cat. no. 3481] K001119515
Wallich, N. [Cat. no. 3479], India K001119504
Wallich, N. [Cat. no. 3486], India K001119528
s.coll. [Cat. no. 3470] K001119482
s.coll. [Cat. no. 3479], India K001119502
s.coll. [Cat. no. 3477] K001119494
s.coll. [Cat. no. 3490] K001119540
s.coll. [Cat. no. 3470], India K001119485
s.coll. [Cat. no. 3489] K001119537
Wallich, N. [Cat. no. 3484], Myanmar K001119524
Wallich, N. [Cat. no. 3490], Myanmar K001119543
s.coll. [Cat. no. 3481] K001119509
s.coll. [Cat. no. 3478], Bangladesh K001119497
s.coll. [Cat. no. 3483] K001119518
s.coll. [Cat. no. 3497], India K001119558
Wallich, N. [Cat. no. 3481] K001119513
Wallich, N. [Cat. no. 3484], Myanmar K001119523
Wallich, N. [Cat. no. 3495], Myanmar K001119556
s.coll. [Cat. no. 3483] K001119517
s.coll. [Cat. no. 3481], Bangladesh K001119510

First published in Prodr. Fl. Nov. Holland.: 221 (1810)

Accepted by

  • Govaerts, R. & Simpson, D.A. (2007). World Checklist of Cyperaceae. Sedges: 1-765. The Board of Trustees of the Royal Botanic Gardens, Kew.
  • Govaerts, R. (2004). World Checklist of Monocotyledons Database in ACCESS: 1-54382. The Board of Trustees of the Royal Botanic Gardens, Kew.


Flora of Tropical East Africa

  • K.B. 57: 257–362 (2002)
  • Prod.: 221 (1810)

Flora of Tropical East Africa
Flora of Tropical East Africa

Herbarium Catalogue Specimens
Digital Image © Board of Trustees, RBG Kew

Kew Backbone Distributions
The International Plant Names Index and World Checklist of Selected Plant Families 2021. Published on the Internet at and
© Copyright 2017 World Checklist of Selected Plant Families.

Kew Names and Taxonomic Backbone
The International Plant Names Index and World Checklist of Selected Plant Families 2021. Published on the Internet at and
© Copyright 2017 International Plant Names Index and World Checklist of Selected Plant Families.