Cyperus difformis

 
Common names: dirty-Dora, rice sedge, small-flower umbrella-plant, variable flat sedge
 
A tufted annual with numerous fibrous roots; stems trigonous; leaves shorter than stem, smooth; spikes small, up to 5 mm long, dark brown, with scarious margins, forming sessile as well as stalked globose heads.  
 
C. difformis is characterised by globose heads of more than 40 spikes. C. fuscus has much fewer spreading spikes.   


 https://08511630493324166816.googlegroups.com/attach/56c5e81582f1fe53/3312.jpg?part=0.5&view=1&vt=ANaJVrGOMMhDzJGuKCQLrO1mnQAjZcTbIQCF2gSSKyFDrW7vVdxAhenW7c-sWOqMUMQNw2Me3Md8ehpCYQ3rgGzyIo2Z_2_MaJPPGHe5ZQl3-mNH-X_L-rghttps://08511630493324166816.googlegroups.com/attach/56c5e81582f1fe53/3310.jpg?part=0.3&view=1&vt=ANaJVrFg0v4ajVp1Lar6ECxRcWUo7GkwAd_lT-XMXeVTydAZScu_4orJje5ACLucnIO9ONKiuruJvvkU1CdXsF-xzGA7lbQ_i61WNHsuyLvHULucWzifqF4https://08511630493324166816.googlegroups.com/attach/56c5e81582f1fe53/3313.jpg?part=0.6&view=1&vt=ANaJVrFBnpUDtjVJjqJuq2ec3XfNVaAuYANppaXT8LmTm_N5BEG-R5aYZTqyR1U1jR9TQjrBjU3IPFV9Xk_ITpXrOnEZ09z-5Qo2PVEUrHPT7pMhZoPp_Ow
 https://08511630493324166816.googlegroups.com/attach/56c5e81582f1fe53/3307.jpg?part=0.1&view=1&vt=ANaJVrGaiF_mUL13uXFeDHqdK0Twt-fiF004yhaKyOUZMSbU_Gkc6eCb0z2ST5BEqFW3IxqR0eOuY8psj3s5HOvfqLjCwrytXhgEuAmjOxmQuxmHKrAjI8ghttps://08511630493324166816.googlegroups.com/attach/56c5e81582f1fe53/3309.jpg?part=0.2&view=1&vt=ANaJVrFtUzDZcZPAQhmMxjdu9MHNVzoAtNOyCSVY2Jx0BwjRxoqI-n0zUnoBSoA3uJe8VLX8mnQKBLprdf_MNlY8rWuePs4FjHRylYfc_lqOHHwMpOI-BFA
https://08511630493324166816.googlegroups.com/attach/56c5e81582f1fe53/3311.jpg?part=0.4&view=1&vt=ANaJVrGFJ0VIhl0rt9iafKCq0DWTXA3Eg_DC9RTq1oblRvz44kv3Hd34B59NlOpdB7Sz1Hxylv5ZJ_wMss5sREI8FRib-8_CwzoUegEQGC7acnH-f1NUXJg
Cyperus difformis L ? from Hooghly 2/11/12 sk2: Found this Cyperus on roadside.
species : UNKNOWN
H &H : about 1.5 feet high, growing on roadside along the boundary wall of residential houses in a semi-urban area
Date : 5/10/12, 10.15 a.m.
Place : Hooghly
Cyperus difformis to me.


 https://08511630493324166816.googlegroups.com/attach/44bee781656117ae/C_difformis_CS.jpg?part=0.1&view=1&vt=ANaJVrEyB1VSm_-VUHCvcP3tQUZY3mW0W12cv-uNQhz3b-xkvxV1P29yrzf8j5gkg3rq6RhyXBE_k76EnuQnccHcm1RNekk6AEEOJ-5cpP5pMzRKPGI0Xo4
https://08511630493324166816.googlegroups.com/attach/44bee781656117ae/C_difformisCS1.jpg?part=0.2&view=1&vt=ANaJVrGCFhCsi7_JCMd32OjbpSooKj7j-i8Yx01BRkZ62mOSkL20Y5fmTIfYVUo0-n7q1580XgsbJXGMgKU0kxXkpaDv5gOu15U1q0DofK5qdcxzLNPQ22o
Scientific name: Cyperus difformis
Common name: nutsedge?
Family: Cyperaceae
A weed of rice fields
 

https://08511630493324166816.googlegroups.com/attach/9d844ccbb27ed623/Cyperus-difformis-Tikkar%20tal%20lake-Morni-1.jpg?part=0.1&view=1&vt=ANaJVrE1WU6aHZLNQYs4FYX1HU1EKT0mcaXQ-aGC9ERDVG00vRliJZNS1YOgG2YB0MJq7Ytg1DpfHKC2RvreXZ44Jjc-e40CUJwe5SN4MohKKB42vkD-jKc
https://08511630493324166816.googlegroups.com/attach/82622d4e874af38d/Cyperus-difformis-Tikkar%20tal%20lake-Morni-2.jpg?part=0.6&view=1&vt=ANaJVrHX-wSDE5Lg32GCsrHrGDs_HdXSNa2DCI2e0PZxBZZe82lb5Rk8cVDgSCpjFyN9D94yKbADpn5I_uDXKdYmruw0sUk841bP45UomV4JqQkP_mUSW_c
Cyperus difformis from Tikkar Tal Lake, Morni:  Cyperus difformis L., Cent. pl. II:6. 1756 (Amoen. acad. 4:302. 1759)
A tufted annual with numerous fibrous roots; stems trigonous; leaves shorter than stem, smooth; spikes small, up to 5 mm long, dark brown, with scarious margins, forming sessile as well as stalked globose heads.
Photographed on April 10 from wet ground around Tikkar tal lake, Morni, Haryana.
Common names: dirty-Dora, rice sedge, small-flower umbrella-plant, variable flat sedge
Correct name for C. difformis is C. fuscus L. in 1753
anyhow this picture doesnt look like C. fuscus

C. difformis and C. fuscus are two distinct species as per Kew Plant List http://www.theplantlist.org/tpl/record/kew-236342
It would be good if you inform us about your source as requested by other members also. <http://www.theplantlist.org/tpl/record/kew-236342>
Cyperus difformis and C. fuscus are two distinct species, recognised by all prominent Floras
This plant is C. difformis, characterised by globose heads of more than 40 spikes
C. fuscus has much fewer spreading spikes

Cyperus difformis L. 
:  6 images. 1 post by 1 author.
Cyperus difformis L., Cent. pl. II:6. 1756 (Amoen. acad. 4:302. 1759)
A tufted annual with numerous fibrous roots; stems trigonous; leaves shorter than stem, smooth; spikes small, up to 5 mm long, dark brown, with scarious margins, forming sessile as well as stalked globose heads.  
Photographed on April 10 from wet ground around Tikkar tal lake, Morni, Haryana. Also photographed from Kashmir.
Common names: dirty-Dora, rice sedge, small-flower umbrella-plant, variable flat sedge 

This is another species of Cyperus for id...is this Cyperus difformis ?

It is Cyperus difformis

Cyperus difformis from Panipat. pls validate
Yes it is Cyperus difformis

https://08511630493324166816.googlegroups.com/attach/1f4c0db36c32982a/DSCN8862.jpg?part=0.3&view=1&vt=ANaJVrFuCYHRbMFVt_INYNbV8-6Vf3UJOQjLIGYgkPlh1Y24aw8EKLIg2Y8tvTSPqIEO4kIyxrhQNHHpZtWa18nNf2O6gurSWCaAwWZwQPNNKghnd19OM2E
https://08511630493324166816.googlegroups.com/attach/1f4c0db36c32982a/DSCN8858.jpg?part=0.1&view=1&vt=ANaJVrE7Qdn56X0SoY4QcHx4bIv61OrzwIxRtrmqnJMsm0sUiNviaJdcYCUXs66t8jgms1aFSwjzGaVCdOJLSO45-zmLH8l0Gx3cbURg4r0gpl_gm5_L19w
https://08511630493324166816.googlegroups.com/attach/1f4c0db36c32982a/DSCN8861.jpg?part=0.2&view=1&vt=ANaJVrHTarZ7hesFWUqp2WgbfkDibeUxw7nnXjiilV4idOtoj4MOY94dg52hN1xEi6w6_N2Qc-PcCR1kHjyPTZ9hupjNEPuFPon1zBVuuhxWqXJgxpmuD8g
Hooghly yesterday : Cyperus difformis L.
: Attachments (3). 1 post by 1 author.
This one is also growing in the same pool of rain water, in front of our school.
 
https://groups.google.com/group/indiantreepix/attach/b7f5ba88f16696ce/P1060056.jpg?part=0.1&authuser=0&view=1
https://08511630493324166816.googlegroups.com/attach/b7f5ba88f16696ce/P1060062.jpg?part=0.2&view=1&vt=ANaJVrFHCu6f7InFroQyZx9tFzKroS34bfdEZEggpX0c6B6ajgLrY5FCQxCQR13uTMstvBZQzIFpw0-5XTQlP32KDb_PP5HJFELNzNLyGcIgMgxYj55dDkQ
Hooghly - interesting Cyperus difformis L. !
:   Attachments (2). 3 posts by 2 authors.
This seems to be Cyperus difformis L., not the usual one what can be found frequently.
While recording i thought it could be another, something like difformis !
FoNA informs, "longest bract erect or nearly so, appearing as continuation of culm" and "when rays short heads sessile or nearly so".
FoP informs, "inflorescence of 1-7 globose ..."
Or, is another?
I think this is also Cyperus difformis L., provided my earlier uploads in he linked eFI site are also Cyperus difformis L.
 
 https://08511630493324166816.googlegroups.com/attach/d1fba5def2919cf2/3._Cyperus_sp.__IMG_5637.jpg?part=0.3&view=1&vt=ANaJVrH11tMLCrmbVAQf71O-Vf907Cw3_DA5_fYfb65oKPOo3ygxlRj9o1PW6zGhIgpfPqzXZbLyQsAnZEQ2pJsUaxbTEjnNxNMavhvcgPAEL_bP2uH2zVAhttps://08511630493324166816.googlegroups.com/attach/d1fba5def2919cf2/1.Cyperus_sp._IMG_5630.jpg?part=0.1&view=1&vt=ANaJVrE7V5W422xHP1tVBeXM3wjId8BvuRqOv4C2uoDb5aqR7PoOq66syydNJQnMqOJpI5S9ConV6d1WWK3LXppU7RA6b8limtFsyPKcdWoNdSgsqjKiXY0
https://08511630493324166816.googlegroups.com/attach/d1fba5def2919cf2/5._Cyperus_sp.__IMG_5633.jpg?part=0.5&view=1&vt=ANaJVrH82hPVKtAoapBq_YuLcBi3-p5CUz1Ow_FFGCWtrqG_7oj-DxEWyYyCTOAz5FZ_z4cOSgF66Y4Xo_c5ezHibsruyb9wSytt3PmFRmkrdOQE4KOhlyg
https://08511630493324166816.googlegroups.com/attach/d1fba5def2919cf2/4._Cyperus_sp.__IMG_5635.jpg?part=0.4&view=1&vt=ANaJVrEt2OCFrC7b6Ei7Nf2Ob5MOMFl7_uK0QwBBPvh7DbRn2xH7W9zQda9KtaKclPD50GxxYrzHwAaw2auSIZ4oOQp91BjirxtIq0xP5vSGYtLdFazUyFU
https://08511630493324166816.googlegroups.com/attach/d1fba5def2919cf2/2._Cyperus_sp.__IMG_5631.jpg?part=0.2&view=1&vt=ANaJVrE8Jun-jXTZHAzPfiotsyvsO2QHJGjYgAfQWz2hSV6Vrp_OKC8E0yrGlYajiVkwzps_TeI_eRZApbYAm1PuCOyKWbzRx5i0DwDT1kOCvDdgHUKFcGA
https://08511630493324166816.googlegroups.com/attach/d1fba5def2919cf2/6._Cyperus_sp.__IMG_5636.jpg?part=0.6&view=1&vt=ANaJVrG27ARoi_r8sQDIhZohcEwVo6mE6lNGteW1XW78PFnYLLk79cxetU2co520sH7Zz6LYgfA55MK02N2kHF7qNxxpnm_tA8eHkGkocg56jtVxbUkbyvo
Cyperus sp. (?) from Assam. 13 Feb 2014
:  4 posts by 2 authors. Attachments (6).
Attached images may be Cyperus sp.. Please ID the plant.
Date :07.02.2014
Location: Assam
Family :Cyperaceae
Genus & species : Cyperus sp ?
Habitat: Grows wild on bank of the pond.
Habit : Herb
It is Cyperus difformis L.
I think it is Cyperus difformis L.
 
https://08511630493324166816.googlegroups.com/attach/22ef0168f10dc28c/_MG_5009.JPG?part=0.1&view=1&vt=ANaJVrGK1E4BKINP5IbvBcTvJ600COOtAcbC7goFqMZrcQ-svl87DlI_4aC1NeL-s2hrGcQ4BqbSz5ed4citjLfO3fIkcYEKWPKenAcWubTsoGk4KCa_LQw
https://08511630493324166816.googlegroups.com/attach/22ef0168f10dc28c/Cyperaceae.JPG?part=0.2&view=1&vt=ANaJVrGerkOAyLIRpO0_f6qFXw80fKYp11U48R7QOFV2gkLGWJRty63333FCgi4dUlu9d8g86YREclVHZ738q8NYYext-T1hPLjSTRoIIyBjCIgUAL4A_pY
Wetland :: Sedge for identification :: 040414MK :: April001
:  4 posts by 3 authors. Attachments (2).
Please help me in identifying this Cyperaceae. Plant photographed by my friend.
Date: 15 May 2014
Place: Ariyalur dist.,
Alt.: 60 m asl 
Check with C. difformis 
Yes, it is Cyperus difformis L.
 
https://08511630493324166816.googlegroups.com/attach/21cf066831fa9d11/P1020726.jpg?part=0.2&view=1&vt=ANaJVrGpilzYH-k5sagvqpgs7tVOria4AQk8fq__xUnOun4cwf9tVvLMR0_2dEiH8DIdDXUWrGMALt2h1-39Q2o4fNno92TyIZ6WCwTybBoaokTN95EvpWUhttps://08511630493324166816.googlegroups.com/attach/21cf066831fa9d11/P1020729.jpg?part=0.5&view=1&vt=ANaJVrGOTjjOYdepmDRvf07d6JsruFu-n4GZF6jts1Taew3Cme3tvtCakvlt07mKtY7FTBhvqYq7yCKo05uScEdXTlVCRmA0bzNK7sZdBQh6Bsy4ZMgOFyo
 
https://08511630493324166816.googlegroups.com/attach/21cf066831fa9d11/P1020725.jpg?part=0.1&view=1&vt=ANaJVrG_pgTVCMC64lK_RQ3mhI1YKIoPt1QX8J-nURM-n6H7jPBKlKVzYi0JrcYWRlgI_UYyd9rE3prpkFum_VycCIQeKeX4VK0_033r-V1bhLYzBSfifjw

https://08511630493324166816.googlegroups.com/attach/21cf066831fa9d11/P1020727.jpg?part=0.3&view=1&vt=ANaJVrElRk3TbUbSMOeaMwX37U--xtDmF2Psj0DaY3e59z3YlaUQaytwMpF0XS40yt2pQ8rc3KLqiQ--VB4kEftPuwk4Rhpcml4fb955caoyqiCumibzGFk
https://08511630493324166816.googlegroups.com/attach/21cf066831fa9d11/P1020728.jpg?part=0.4&view=1&vt=ANaJVrHb_tQ_FFGzSGBkKurDc-Jjed6reOxU1KC2mMC-8nd5Fv1TFR3FPX8CzfDfB-LXSSs-qrrSFWn8QMiaSMwt-Qpmtmk8TSFQ39BODAkihlo-ETls2SI
Hooghly : 23 cm cyperaceae : Attachments (5).  5 posts by 2 authors.
This 23 cm herb, with glabrous & triquetrous culm, found in a low land.
Photos were recorded on 7/5/13.
The only match i could find for this (C. difformis L. looking) species is Cyperus fuscus L. -
  1. http://www.efloras.org/object_page.aspx?object_id=44933&flora_id=5
  2. http://flora.huji.ac.il/browse.asp?lang=en&action=specie&specie=CYPFUS&fileid=18681

The problem with Cyperus fuscus L. is that nowhere i could find any info that suggests it can be found in West Bengal.
Yes it is Cyperus difformis 
Can be Cyperus difformis, need a specimen to confirm the identity
 
 
https://08511630493324166816.googlegroups.com/attach/26b40912352bd/20200708_181625.jpg?part=0.1&view=1&vt=ANaJVrHzOFgI9IaKzqjwWw5Ow9yR9kOb3Iu4752u6QE0tLEOm88j3Jt_Z__w_YWALFe3qn_8K2BHSv2K1rYVkaEIxVecymrnKdSkLxhvPMfshtUopcKNc5g
https://08511630493324166816.googlegroups.com/attach/4dfd51adac63e/20200708_181551.jpg?part=0.1&view=1&vt=ANaJVrEpVqzbhMKdG3nzI1We0kJ1cGKKLNuKsmz9125z9cih6kFlXdTjK75oxf4Ols86zy6WzyaEX61sAfp98SIrdueJbzzjKoG9EnDajw7OnJfQ1Tp70dA
Cyperus for validation : 13 posts by 4 authors. 2 images- 2 & 3 mb. 
Request for validation of Cyperus eragrostis from Bilaspur. Photographed in July 2020.

Looks close. Please wait for expert opinion!
What about the full habit image?
Attaching the habit image.  
Attachments (1) - 3 mb.

It is Cyperus difformis L.

Cyperus difformis


References:
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