Images by Surajit Koley & (Karuna Kanta Das – Id by Surajit Koley), (For
more photos & complete details, click on the links), 
(inserted by Bhagyashri Ranade)

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The key in Bengal Plants :-
i) mature spikelets patent; glumes obtuse ——— distans
ii) mature spikelets collapsing, tufted; glumes often minutely mucronate —— nutans

 
Erect, rhizomatous perennials; rhizome short, knotty; culms solitary or few together, 27-80 cm tall, triquetrous, thickened at base. Leaves few, basal, 8-51 x 0.4-0.7 cm, linear, apex acuminate, scabrid on margins; sheaths 6-15 cm long, purple-brown. Inflorescence compound to decompound; leafy bracts 4-6, the lowest upto 42 cm long; rays 5-12, very unequal. Spike loose, broadly ovate-pyramidal, distantly bearing 8 to 20 spikelets. Spikelets 0.8-2.2 x 0.1 cm, linear, subterete; rachilla flexuous, winged. Glumes distantly disposed on weakly zig-zag rachilla, 1.5 – 2 x 1 mm, ovate-oblong, obtuse, margins white-hyaline. Stamens 3; anthers oblong. Stigmas 3. Nut c. 1.5 x 0.5 mm, oblong, trigonous, apiculate, dark brown, minutely puncticulate.     
Flowering and fruiting: October-November     
Along banks of streams, also in wastelands and roadsides      
Pantropical
 

Cyperus distans is a PERENNIAL growing to 0.5 m (1ft 8in). It is in flower from Aug to September, and the seeds ripen from Aug to September. The flowers are hermaphrodite (have both male and female organs

The juice of the root is used in the treatment of fevers[272].
The leaves are used for weaving hats, matting etc[178].
(From PFAF )


Cyperus distans is pantropical and subtropical in distribution. In India it is found in Andamans, Andhra Pradesh, Assam, Jammu Kashmir, Madhya Padesh, Maharasthra, Karnataka, Kerala, Tamil Nadu, Megalaya, Manipur, Punjab, Sikkim, Uttar Pradesh and West Bengal.  
It is found growing in wet places, edge of pools, ditches and streams, in rice fields and in wet grasslands. It is found growing in mats as floating vegetation in shallow waters. It grows as a weed on roadside and cultivated lands, from the plains to 2600 m.      
(From  IUCN Red List (LC) )


Hooghly Today : Cyperus sp. 02-06-2013 : Attachments (13 + 11). 6 posts by 2 authors.
This is about 2ft. or a bit tall cyperus, found on roadside. I didn’t have any scale with me.


I think this cyperus, found yesterday, just above the waterline of a pond, is the same species as in my earlier upload in this thread. This time i have stats.
Culm height : 70 cm; triquetrous, each side 4mm wide, smooth angle, smooth surface
Leaves : about same length
Ray (?) : 15 cm avg,
Raylet (?) : 6 cm
Can it be Cyperus distans L. f. ?


The following pictures (links) are what i think of C. distans L.f. –

At least the first set of photographs in this thread is also C. distans L.f.


 

 

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Cyperus sp. collected from Kamrup district, Assam. : Attachments (5). 6 posts by 4 authors.
Attached images are Cyperus sp. collected from Kamrup district, Assam. Please ID the plant.
Date :11.06.2013
Location: Kamrup district
Family :Cyperaceae
Genus & species : Cyperus sp.
Habitat: Grows wild on waste places
Habit : Herb


Two closely looking Cyperus are 1) C. distans L. f. 2) C. nutans Vahl
The key in Bengal Plants :-
i) mature spikelets patent; glumes obtuse ——— distans
ii) mature spikelets collapsing, tufted; glumes often minutely mucronate —— nutans
FBI. vi. 608. notes “… it is difficult to draw a line between this species (C. nutans) and fine examples of C. distans” 
For its patent spikelets i think this species is C. distans L.


With its laxly distichous red spikelets this is C. distans L.f.


 

 

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Hooghly Today : Cyperus nutans Vahl ?Attachments (15). 5 posts by 2 authors.
This cyperus is growing on a railway-platform, as you can see in the 1st pic. The middle one (2 or 3 in a bundle) with immature spikes and the left one (2 or 3 in a bundle) with mature spikes.
Each plant is with a culm of about 1.5 ft.. compressed 3 angled, about 6 mm wide. Leaves are longer that culm and involucre about same size of culm.


The difference between C. distans & C. nutans in FoC – http://www.efloras.org/florataxon.aspx?flora_id=2&taxon_id=109010#KEY-1-54
In FBI –

I may well be wrong, but this seems to be same C. distans L. f.


 

 

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Cyparaceae ID from Bangladesh SM1153 posts by 2 authors. Attachments (2).
Habit: Shrub
Habitat: Wild

Location: Dhaka City


Looks like Cyperus distans L.f. 


 
Grass ID from Bangladesh SM110 : 8 posts by 4 authors. Attachments (2).

Habit: Herb
Habitat: Wild
Location: Dhaka

Flowering: June


Cyperus odoratus


Belongs to Cyperus (cyperaceae); may be C. diffuses


It is Cyparaceae member. Probably Genus Cyperus


Looks like Cyperus distans L.f.


It is Cyprus distans


 

 

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Grass ID from Bangladesh SM135 : 4 posts by 3 authors. Attachments (2).
Habit: Herb
Habitat: Wild
Location: Dhaka City


Cyperus sp.


Looks like Cyperus distans L.f.



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MS Nov.,2017/01 Cyperus sp. for ID : 4 posts by 2 authors. Attachments (2)

Location : Aizawl (MZU)
Altitde : ca 820 m.
Date : 09-11-2017
Habit : Herb with triangular stem
Habit : Growing wild along roadsides.


Pl. check with images at Cyperus distans L.f.  


It is Cyperus distans L.f.  


 

 

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