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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.
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C. difformis is characterised by globose heads of more than 40 spikes. C. fuscus has much fewer spreading spikes.
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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.



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Scientific name: Cyperus difformis
Common name: nutsedge?
Family: Cyperaceae
A weed of rice fields


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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.



Images by Gurcharan Singh (For more photos & complete details, click on the links), (inserted by Bhagyashri Ranade)

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Poaceae, Cyperaceae and Juncaceae Week: Cyperaceae-Cyperus difformis from Morni and Kashmir-GS38:  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 


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Poaceae, Cyperaceae and Juncaceae Week :: Cyperaceae : Cyperus sp. 2 for identification – NS 40 : Attachments (2). 3 posts by 2 authors.
This is another species of Cyperus for id…is this Cyperus difformis ?


It is Cyperus difformis



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Poaceae, Cyperaceae and Juncaceae Week: Cyperaceae -Cyperus difformis from Panipat BS 8  : Attachments (2). 6 posts by 3 authors.
Cyperus difformis from Panipat. pls validate

Yes it is Cyperus difformis



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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.


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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.



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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.



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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.


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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=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



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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


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Cyperaceae from Gujarat: 2 high res. images.
Collected from wetland of Gujarat.
Oct.2021


Pl. check Cyperus difformis L.
A very common Cyperus near wetland margins.


Yes it’s


Cyperus difformis L.



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References:

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